Corvette optispark problems

Corvette optispark problems. I hope this helps to remove some of the mystery about the OptiSpark. I need to replace my Opti Spark. Third Worst: 1986- bad sensors create frequent nuances. At 57,588 miles I installed another unit as mine whent bad???? At 58,401 the opti spark again whent bad??? Now at 58,855 It is bad again??? The issues surrounding the Optispark should be understood by those who own, or are considering purchasing, a car that uses the Opti. Currently I am using the Fitech unit and factory ECM on a 90 with a zf6 with all gauges working. At the end of the optispark harness (disconnected from the opti) with the key ON, you should see: A = ~5vdc Hey Herb. Spark Plugs firing, fuel rail 1992 Corvette: Recall: Optispark Distributor - General Motors has determined that certain 1992 Corvettes with LT1 engines (VIN code "P") have been equipped with Opti-Spark distributors which may develop a faulty low-resolution pulse signal. XFIRECURIOUS. I don't ever want to replace the opti again and if I go MSD I will probably buy plugs, wires, and C4 Tech/Performance - opti spark problems after install, have spark but won't start - Hi all, I installed a new Cardone opti-spark and now won't start, When I got it I did the vent mod on it then when I went to install it it wouldn't fit flat against the timing chain cover, even with out the spline shaft attached. On the 1992-93 ecm, this is wire C5 (green connector). Tired of this crap! MSD is $500, Dynaspark is $600. I bought it a couple of years ago, and it's my first C4 Tech/Performance - MSD Optispark vs Dynaspark - what's the verdict? - I need to purchase one this afternoon. Last year I put 1000 miles on the vehicle the year before it was 1500. Just curious if anyone else has had this problem and what you did to solve it. It materialized on the lowest point of the forward cross member, I just had my water pump replaced on my 1993 Ruby, I also wanted them to replace the optispark while they were at it. I C4 General Discussion - What actually goes bad on an optispark when it gets wet? - I have a bad opti. EUR - Euro; Since 1977 C4 General Discussion - Optispark LT1 1994. . This weekend, in heavy traffic in the rain and oppressive humidity, the engine began to run rough under load and at idle. We changed out the Kleine Lehrstunde zum Thema Optispark: Corvette-Center in Möhrfelden merk ich mir danke, sind auch bloß 100Km von mir entfernt. You need to either add a vented C4 General Discussion - When was Opti-spark improved? - The opti-spark system showed up on 1992 and later Corvettes. I recently purchased a 1992 C4. Before this event the engine ran perfectly. C4 Tech/Performance - optispark problems - I have a 94 coupe with an LT1. , but this gets expensive, and is very labor intensive. I am at whits end regarding the opti spark! At 55,673 miles I installed a new water pump and opti spark. gain coil per cylinder ignition performance and perhaps most Well, actually the (Corvette version) LT1 never matched the peak 370 ft # torque of the L98 (330 ft# initially and later 340 ft#). Complementary Work: This would be a good time to install new spark plug wires. BANGHEAD can we get a sticky, with pictures, about the optispark options here? My 1992 Corvette (garage kept) wasn’t started for about 3 months. ALREADY DEAD. Engine turns C4 General Discussion - Opti isnt the problem apparently! - Hey guys, I have a 1992 corvette and am having some problems with it. >>The MAD kit will destroy your Optispark. C4 Tech/Performance - optispark oil leak - ok here goes my 1st post Im a virgin here. The OptiSpark has two distinctive sides - the high voltage and the low voltage. C4 Tech/Performance - Opti Spark, What's the best one to fix the issue. I'm picking up the car in a couple of weeks. I think the optispark problems are blown out of proportion. die Optispark gibt es doch erst seit 91/92 oder so?!? Ist das wirklich ein durchgehendes Problem wenn man PEch Shop for 1992 Corvette Petris Opti Spark from Zip Corvette - your source for C4 Corvette distributor and ignition components. Car is at the shop AGAIN for a new opti. So what can you do to keep your unit in good shape? The short answer is. Because the distributor is located in the traditional Gen I location, high and to the rear of the engine, it does not suffer from the reliability problems that plague OptiSpark distributors. Opinions are mixed on its functionality. You can change the CAM, timing cover, CAM gear, etc. I Explore common problems with the 1994 Chevrolet Corvette, including anti-theft issues, leaking water pumps, and essential maintenance tips on RepairPal. What is the best aftermarket replacement for an optispark on a 1992 corvette and will it put an end to the optispark and Ivan ASE Master Tech. November 04, 2015 • optispark • optispark failure • This 1996 Chevrolet Corvette coupe has MSD's Pro Billet LT1 distributor for 1992-1996 Corvettes installed to replace the factory Optispark ignition unit - Vette Magazine The vented opti really helped with the moisture issues. Currency. trower Discussion starter 67 posts · Joined 2022 Add to quote; Only show this user #1 · May 30, 2024. Typical of a traditional SBC. im debating on whether to buy a new oem ac delco optispark and install the 96 revised vacuum hose harness with some go to camaroz28. C4 Tech/Performance - New Optispark fails after 50 miles - I replaced my GM (Delphi) Optispark that failed due to a bad optical sensor module. pressure at the fuel rail. Buy replacement distributor: https://amzn. Is this something I could possibly analyze myself and In this video I explain and demonstrate how to replace the optical distrubutor in a 1993 Chevrolet Corvette with the LT1 engine. I then plugged in a spark plug tester and did not see a light when trying to turn it on again. C7 ZR1 C4 Tech/Performance - Optispark problems - Getting a trouble code for my optispark and need to replace it ('93/29k miles). Purchase everything you need to complete the job and get a free water pump bearing seal installation tool! This kit includes: Ventilated Optispark distributor (1 year, unlimited mileage warranty) Intake fittings (1992-1994 Corvettes) Water pump (Gates) Water pump gaskets (Fel-Pro) Engine coolant temperature C4 Tech/Performance - NAPA Optispark distributor verdict - Data points are good, and the which opti is best never ends so here is one more data point; My original opti died @~155k, 5 years ago. HELP. They say it was a faulty oil seal that caused the failure. I am going to change it out this weekend. Here are the symptoms: Car always starts right up. My symptoms: slight stumble or dropped cylinder at idle, it was very intermittent, a sudden jump on the tach. is a family-owned Corvette and GM high-performance parts and service business founded in 2008. USD - US Dollar. Left it sitting on blocks in garage for a few years. We tried the knock sensor and it works OK. It got worse, much worse until it was replaced. I'll wager that a rotor and cap will get you back on the hat die LT1 bis 96 durchgehend die Probleme mit der Optispark? Oder wurde da später mal was dran geändert? One common cause of OptiSpark irrigation is water-pump failure. C4 Corvette C4 General Discussion - Optispark LT1 1994. C8 Corvettes for Sale; C8 Parts for Sale/Wanted; C8 Dealer Inventory; C8 Vendor for Sale; C7 Corvette, 2014 - 2019. It's worth considering in your case IF you've had no opti issues. the car is a 1996 lt1 ce with 71 k miles I just bought a few months ago. The OptiSpark was also used in other GM vehicles. (Opti-Spark Replacement, ECM, PROM, Plug CorvetteForum - Chevrolet Corvette Forum Discussion; C4 Corvettes, 1984 - 1996; C4 General Discussion; We get lots of n00bies and 1-post guys with requests, frequently for drivability or electrical-related issues. C4 Tech/Performance - Optispark Install Help! Timing/backfiring - (Fyi I a huge noob when it comes to cars, enlighten me! Im trying to learn as much as I can!) I have a 94' corvette and I am trying to install a vacuumed optispark. I have water pump pulled already. I have a 1992 auto convertible. However, this assumes many facts not in evidence. When moisture and C4 Tech/Performance - Optispark Replacement Seal - I just finished an Optispark replacement and a complete rebuild of ther cooling system, new radiator, heater core, WP, and hoses on my 1995 LT-1. Below, he describes the replacement of an Optispark distributor on his 1995 Pontiac Trans Am. It also seems like the design/layout make it susceptible to problems whenever a water C4 Corvette Forums. Select to learn more. The day after the rain I had driven it for a few minutes, then after a moderate Though the GM Optispark is not without its faults, This issue was minimized with ’96 and later engines with a distributor housing fitted with a simple 1/8 inch vacuum hose fitting that was connected to intake manifold vacuum. It is worth $3, not $21 and has one vacuum C4 Tech/Performance - 94 LT1 sudden no-start solved -- Ignition Control Module (Coil Control Module) - All fixed -- YEA! -- but thought I would share what I learned Story goes as follows: Friday, drove car, ran perfect, no problems what-so-ever, pulled into garage and there it sat for a little more than a week. EDIT: PROBLEM FIXED!!!!! It was the Optispark (leaked on by the waterpump) -----Vette is 1993 A4, w/ 75k Started 12 months ago, slight hesitation @ 2k RPM when warmed up. Skip to Content . However, after that whenever I accelerate any faster than a prius I can hear the engine choking and the revs hesitate. Major knock counts C4 Tech/Performance - Optispark Install Help! Timing/backfiring - (Fyi I a huge noob when it comes to cars, enlighten me! Im trying to learn as much as I can!) I have a 94' corvette and I am trying to install a vacuumed C4 Tech/Performance - Confused about which brand of Optispark - Hello all, I am about to start pulling apart and replacing my water pump and optispark. See Optispark modification detail in C4 Tech Tips Section and Corvette Fever. To remove the crank shaft pulley. ony 1 so far has had a issue. The car was in overall good shape. The parts store shows i have a M. 9. Just make sure the optispark vent hose never fails. Leaky water pumps have often been found to be the issue when it comes with opti-spark troubles. The High Voltage: This is the cap and rotor, they corrode. A friend of mine once had a 95 Z-28 that would only run well when headed south! The car would start and run perfectly for about a mile down the road C4 Tech/Performance - Optispark. Code 16 (ODBI, not sure of the ODBII code) - opti portion is failing. This is the black/red wire that goes to terminal "A" on the pigtail connector. com). The extra wire in the 1992 connector is a shielded ground wire, GM figured out a year later you don't really need. There is timing and couple other things to consider, hard to say without hearing the car trying The first year of the optispark had no vent; condensation had no way to get out and corroded the contacts. I was looking at an MSD, which are around @630 on some sites, but around $200 on sites as Corvette Central. The top of the distributor was replaced last year. to/3blxXGH#c4corvette Just did my plugs and wires on my 95 Trans am about time 77800kms :), question I have is I want to upgrade my optispark should I go with genuine GM or with MSD optispark? I have heard that the aftermarket ones don't last as long,i find that hard to beleive cause they should be better!! any help would be very appreciated 1992-1996 C4 Corvettes are synonymous with distributor and ignition issues. Optispark Take the vent hoses from the 96 GM Corvette OEM Vacuum Harness kit and use the one with the two in-line gizmos in it. There is a shaft that connects the Optispark to the Cam gear. At temp I had an oil leak. The Fuel Pump was bad so I replaced it, now I have 42 lbs. So, as of this day, I still don't know what C4 Tech/Performance - Code 36 Opti-Spark Ignition Timing (Resolution Pulse) '93 Lt1?? - I have a code 36 High Resolution Spark Failure, according to my Mac Tools Scanner, on my '93 Lt1 Coupe. i was even thinking of buying one from napa or kragens for 221 dollars. is the o ring on the opti or do i have to buy the o ring separately. I have also been in contact with Brad lately and his email is still active, he said he has been working on some, so if it is original, you could contact him and see if he can help you out. Check the wiring connections, especially the pigtail connector from the Optispark to the main wiring harness. I know there have been lots of complaints about the Optispark. Will I need a puller to remove the pully once its Today I'm going over the optispark ignition system of the GM LT-1 engine. It has a vortech supercharger, and when it was installed, the stock optispark vent set up was unusable, so it was left off. It would continue the rough running until 1992 stock base convertible Corvette with Optispark & LT1 MS3X 357 - C 1. I just remember the scanner tool saying that there was problems with either the Optispark or the knock sensor. I'm pretty C4 General Discussion - Optispark vent help - I have a 95 corvette lt1 that I'm rebuilding the engine on. Now it won’t start. 62 posts · Joined 2009 Add to quote; Only show What is the best OptiSpark available now days? Jump to Latest 1K views 8 replies 5 participants last post by Cjchemist Jun 13, 2024. What Model Years are these guys having the most issues with? I worry more about washing the engine in my Blazer than in the Corvette. my favorite newbs are the ones that have a gen 2 vented oem optispark and they 'proactively replace' their working good oem unit, with a chinese one, because they heard thAt optisparks fail. Will just replacing the cap and rotor fix my problem? I am replacing the waterpump. C4 Tech/Performance - When to replace the optispark??? - Ok, this is the story. My 1997 LT1 Optispark Distributors has corrosion problems on the bottom of the Distributor. It After replacing the optispark for the second time and not seeing the issue go away, I then put in new AC Delco Spark Plugs and wires. Sale ends 10/31 at Just did my plugs and wires on my 95 Trans am about time 77800kms :), question I have is I want to upgrade my optispark should I go with genuine GM or with MSD optispark? I have heard that the aftermarket ones don't last as long,i find that hard to beleive cause they should be better!! any help would be very appreciated Count on Zip Corvette for the best quality Corvette Parts available for your 1984-1996 Corvette. I've been Pack mal unter die Wasserpumpe, ob die unter sich macht, dann haste Wasser im Verteiler (Optispark). At the time, I lived in the middle of no-f'ing-where, Colorado (Telluride) and I needed a distributor ASAP so I bought the I read the other best option is the Delphi optispark, but I can’t find one available anywhere. Usually, a leaky water pump kills the Optispark so I was going to replace it with a new MSD Opti. OPTISPARK DISTRIBUTOR INSTALLATION COMPONENTS. In beiden Fällen heißts: neuer Optispark. It was a bad optical sensor in the Opti-Spark distributor. I have had some problems in the past from the opti taking a direct hit with an undercarriage spray at a car wash. Question . 2015, 16:12 ) Corado. I don't have the $$$ right now to do the opti replace & upgrade OK SV gang, lets hear your thoughts / reasons why the non vented optispark distributor are the cause of so much pain and agony in the C4 community. 3 years later and only C4 General Discussion - 95 Optispark rust problem - My 1995 had the optispark and water pump replaced by the Chevy dealer. This corrosion, or carbon tracing, is caused by moisture build up (natural build up at that! morning dew, etc) being welded by C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine I can't understand why I haven't seen other threads about heat problems with electronics. DO NOT force the electrical connector in. They have most recently replaced all vacuum lines. From what I can tell this seems to be the only decent option right now. This was 13 years old with 7000 miles on it. For what I’ve been hearing, this is a common problem on the LT1 V-8s from 1992-1994. Now has New timing sprockets and chain, New Opti Spark, New water pump, New fuel pump and filter and New battery. Vehicles operated in wet climates were even more susceptible to problems. Problem: C4 Tech/Performance - Fitech 38350 tpi Installed - Just installed the Fitech Tpi and figured I'd make a post when I was researching about it I couldn't find much info on the install except a few threads on this forum. P. The engine turned on about 15 minutes later. This time, I'm moving to the late C4 era, ala 1994 M6 coupe. C4 Tech/Performance - Best Optispark Replacement - On my 1996 CE I'm having problems getting it to start at all. 95 and 96 are vented, and 99% of those owners have Vehicles operated in wet climates were even more susceptible to problems. This never happened before. C4 Tech/Performance - LT1 Distributor / optispark problems, some useful links - A couple of months ago, I did a search on these forums and actually came up with a couple of threads talking about the Optispark. Thanks- C4 Tech/Performance - Optispark replacement - '93 LT-1 - I had to replace the water pump in my '93 LT-1. This is why this comes after the other two as the worst model. Then as I was moving the crank up to 12:00 I clicked the ignition too far. C4 Tech/Performance - optispark buyers beware *must read if you are buying one* - Ive been through optispark hell in the last month as I converted my 93's timing cover from the early model (driveshaft drive) to the late model (cam dowel drive) & vented style. The newer 1995+ LT1/LT4 engines have a vacuum hose connected to pull the moisture out of the Optispark. It would stay off for long periods of time and I didn’t There is nothing wrong with the design of the Opti; many Japanese cars run the same unit without problems But they are not mounted down low under a waterpump that can leak "Being able to "think outside the box" presupposes you were able to think in it. you then drill out one of the 3 weep holes to 1/8" and epoxy the other 2 shut) on the base of the unit and use C4 Tech/Performance - Changed out Opti-Spark but Still Not Running Right - We are working on my daughter's 95 LT1 with 130,000 miles. Was Optispark has caused headaches in the past, but there’s an imbalance of stories when it comes to failed units versus those that have Here are the main issues with the unit. :yesnod: C4 Tech/Performance - MSD Optispark question re: timing adjustment - Early last week I had a coolant hose blow in my '93 and and coolant soaked everything under the hood, including the opti. that started with the car missing and then completely dying. Possible Opti Problems. A couple of months ago we had to replace water pump, so I assumed it was probably the optispark. With a scan tool I can see it's detecting knock & retarding the timing. 1. 21. You solve one problem and cause another. They may very well be more durable and trouble-free When they sit, like Camaro's, Trans Am and Corvette sometimes will is when most of the problems arise. Hallo, hat die LT1 bis 96 durchgehend die Probleme mit der Optispark? Oder wurde da später mal was dran geändert? (13. Buy a $12 '96 GM Vette C4 Tech/Performance - Opti-Spark Distributor 95 Vette - Has anyone replaced their Opti-Spark Distributor with a Delteq Opti-Direct Ignition System? My 95 is in GM shop for 2nd time in 2 months having the entire GM opti-spark distributor replaced. So I've installed a new msd cap and rotor for the distributor and have also replaced the The 1994 Chevrolet Corvette has 1 problems reported for opti spark failure. So I've installed a new msd cap and rotor for the distributor and have also replaced the C4 Tech/Performance - DTC/Code 36 After Optispark Replacement - I have a 92 coupe with ~52k miles that I picked up a couple months ago. 1k 31 2021 DCT Filter change and transmission change. At the end it would seem to just shut off, but would catch and run fine again for short periods. So is the cap C4 Tech/Performance - How extensive is the Optispark failure rate? - I've studied the posts and TSB's, and as far as I can tell, the unit seems to have significant failure issues and is expensive to repair unless you do it yourself. Menu Cart 0. com and hit the lt1 tech forum and search for it a few guys are using them . 2015, 16:02 ) Corado. Then in the later years of the C4 they improved the system by alllowing water to escape from the system. This problem got worse and worse. C4 Tech/Performance - 1994 Vette No injector pulse - Help My 94 vette died when opti spark drown from leaking water pump. It was my first failed Optispark experiment. Talent: (4) Applicable Years: 1992 to 1996 Tab: $500 to $1,000 Tip: Don’t ever let any water get in the area of the Opti-Spark if you detail your engine compartment. B. Here's what I know: I am getting a code 16 Low Resolution Pulse not being read and I think it is the Opti. C4 Tech/Performance - Yet another Optispark question - Hi everyone, Sorry for littering the forum with another Optispark question. This did not solve the issue, so I borrowed another ECM (GM#16159278) and put it into the car with the PROM out of my original ECM. I used to have a can of LPS Water Dispersant spray on Water contamination of electrical. If any condensation occurs it never gets out either. Major knock counts Snoozer sorry to hear about your possible opti spark problem. I was aware when I purchased it that it was setting a code 36 and expected it was being set due to a bad Optispark. If it fails then make the repair. This is a common problem for these LT-1's (at least my '92-er) and can be expected EACH 50. Still the LT1 is a good engine, beside the opti which is just a distributor the only other big issue I can recall having is intake gasket leaks. What you'll find though is that more often than not people blame the opti for their problems only to find out that it is not the cause. Looks like either the timing cover seal or some other seal around there is leaking and the moisture from the oil on the cap is fooling with the optispark. The Opti-Spark system first appeared in 1994 Corvette and Camaro LT1 EFI engines. I converted mine over to the C5 3-wire oil sensor, which if you OPTISPARK DISTRIBUTORS and KITS. The car has been sitting for about two years (I know, It’s a shame). my other car is a Honda Civic-no worries! There are no problems with dying optisparks unless either: A. If your converting to a newer optispark or using the MSD (which only covers 93-97 Optispark Probleme durch alle Baujahre? (13. Jump to Latest 53K views 56 replies 13 participants last post by 95 Firehawk Jan 22, 2013. Wire leading to the computer is also corroded. Close. :LS1LT1flag: also was wondering what is the best replacement the oem or the msd kit. It MUST be thickly coated with high Temp black Permatex. Expecting any distributor, even the tried and true HEI The first step is to check for any DTCs (Diagnostic Trouble Codes). one of my buddies said i'm probably in on the exhaust C4 Tech/Performance - Replacing the Optispark 96 LT4 - :willy: Well the Optispark is getting replaced on my 96 LT4 at 80K, it has all the signs, even though the prior owner replaced the water pump at 40K I am going to replace it again at 80K, plug wires as well. Save Share Reply Quote Like. The earlier OEM opti decoders were much better IMO then most of the "junk" on the C4 Tech/Performance - MSD Optispark trouble - I have a 1993 Corvette I recently bought an MSD Optispark and I took it to a mechanic to get installed, the mechanic called me and told me that the factory harnes doesn't connect to the MSD connection, I do know that the 1992 harness is different and that MSD doesn't C4 Tech/Performance - 1992, New Optispark, Spark out of coil, but not out of Opti - Hi All, I just put a new optispark into a friends 92 Corvette which last ran about a year ago. I've had drivability problems since and after lots of research and troubleshooting, I believe the opti is failing. The fuel pump was bad, but that's been replaced and I am definitely getting fuel at the Schrader valve. So if any one has any tips for me before I dive into The opti (OEM) I'm currently running was condemed and in the scrap pile simply because of a bad cap. been reading for many years and have searched for days on the internet to find a answer to my oil leak problem. i found the low coolant leak it probably killed my opti sensor. No problem. A. It was running rough with some backfire and engine vibration. Keep in mind that the replacement *is* conducted on a TA and not a Corvette so there may be differences. Cam driven water pump. C4 General Discussion - Issues with Optispark ? - After having owned an '86 and an '89, I'm about to get Vette #3. Halloween SALE: 10% OFF qualifying orders. 1963-1996 Corvette LS Engine CONVERSION PARTS. I'm in the midst of a shutdown-when-warm issue on my 1992, with no codes. BOOKS. i figure if im going in deep on this car i might as well do it right the first PLEASE READ OUR BLOG POST PRIOR TO PURCHASE. Much to my dismay the first unit failed within 800 miles of the install, sent that one back and got a replacement; and as of this sunday i'm stranded again because this one has failed only about 2000 miles after install. Ie, if the splined shaft lines up such that the opti can be installed flush with the timing cover thats it. The first year of the optispark had no vent; condensation had no way to get out and corroded the contacts. Kann mir jemand sagen wie die Belegung mit kabel am Optispark aussieht , also wo welcher Zylinder an welschen Anschluß des optispark kommt. What really makes the Opti issue worse, if you can believe that is possible, is that it is stuck underneath the factory water pump and behind the crank pulley, which makes swapping it Remove the 3 bolts that hold the Optispark in place. I've searched for many hours, and read everything I can find - however, I still have some questions. It also seems like the design/layout make it susceptible to problems whenever a water A couple of years back when I purchased my 1995 LT1 Corvette I ran into an expensive issue with the optispark, though it sounds (and sounded at the time) like nothing new to these pages - the car started crapping out on me randomly and a ridiculous sum of money and a new ignition system later it was all better. I just bought this corvette Here are the death signs: Waving Idle - carbon tracing on the cap and rotor portion. The rev limiting at 3500-4000 RPM went away with the ECM change and then came Second Worst: 1985- the engine problems don’t seem to have an end on this one. They found the problem. But when it warms up, it will Unfortunately, the Opti Sparks from 92 to 94 are non-vented, and the condensation which creates rust kills it soon or later. My mechanic replaced the distributor/water pump and saved the OEM optispark distributor. High RPM stumble - Not sure what causes this, but I suspect it's the opti side. I'd have thought you guys down south (sorry, "y'all down south") would get this a lot. I've seen cheap remanufactured opti sparks fail when installed on a high horse power application. I'm wondering weather I should go MSD, Delphi, AC Delco, or any other opti that's out there. Quick Links. Be well, SJW This video will show you how to replace the Optispark distributor on a 1992-1994 C4 Corvette. Any suggestions on the brand or source? Save Share Reply Quote Like. Make sure to have the optispark harness replaced to a better unit: 94-97 GM LT1 OptiSpark Ignition Extension Harness | UPR (uprproducts. 000 MILES!!! Remedy: change both opti spark and water pump and drive I don't remember the exact codes. When I tried to start it, it cranked fine, but the engine showed no signs of starting. The 1995+ Optisparks do not fit the 1992-1994 LT1's. I'm pretty C4 Tech/Performance - Diagnosing Injector Problem L98 - I could use a little help diagnosing a starting problem on a 1987 Corvette. If you do the opti upgrade (venting) be sure to replace your wires, plugs and your water pump. Time: 2 hours Tools: A Visa card with a large credit line. Should I just tread lightly with C4 Tech/Performance - Replacement Optispark and Water pump install - Part 1 (includes pictures) - A little background story: A few month's back, my '92 developed a very strange hesitation problem which would show up a few seconds after the car started running - only to last a few seconds - then disappear all together. Over the years we have discovered that several original equipment O . I lost both the high and low resolution signals. However, the FSM says that I need to remove the balancer and hub. Sobald die Kühlmitteltemperatur über 80°C kommt möchte die Dame nicht mehr. Reverse cooling from the traditional SBC. I checked the manual and the The other optispark alternatives, needless to say, are all very expensive and most of them still require the use of the original optispark so you're not really "eliminating" anything. Will the pully allow me to remove the bolts without using a special tool to hold it in place. The US Patent & Trademark Office C4 General Discussion - Optispark vent help - I have a 95 corvette lt1 that I'm rebuilding the engine on. you then drill out one of the 3 weep holes to 1/8" and epoxy the other 2 shut) on the base of the unit and use that as the vacuum source. this is how you retrofit the vents onto a 92-94 optispark. The 92 LT1 Corvettes are a one year only bastard. 22. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine standby for more problems to follow. The total price for replacing the water pump and changing the optispark along with new plug wires and changing the oil and filter would have been approx $1800. 1k 33 C8 ZO6 Excess oil reading. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine It's essentially a "go-between" ignition controller that takes signals from the opti part of the optispark and uses that--and the timing signal from the PCM--to fire the LS coils. After purchasing the vehicle, I also noticed that the water pump Check the wiring connections, especially the pigtail connector from the Optispark to the main wiring harness. Also mal bei Rockauto nachgesehen. I don't have C4 Tech/Performance - Optispark Troubleshooting - I have a friend with a '92 LT1, and I'm trying to give him some long distance support. The only Corvette engines to use the OptiSpark were the LT1 and LT4. Even if the pump does not fail completely, higher-mileage units often exhibit leaky seals, which allow Das übliche LT1 Problem. I know y'all will tell me to probably replace the entire thing with an msd or some thing but that is out of my budget. 08-17-2006, 01:34 PM #4. I Video Breakdown: 00:20 1994 Chevy Corvette, intermittent no start, new fuel pump installed, code 41 EST Open code01:22 - RPM signal during cranking 01:59 - c Does the Chevrolet Corvette C4 have brake pad problems? The Corvette C4 is not unfamiliar with a condition in which the hold-down springs for its brake pads snap, causing both vibrations and noise. I believe this will apply to the Camros and C4 Tech/Performance - Are these Optispark symptoms? - Hey All, I have a new (1 month, 1500 mile) 1996 optispark and new water pump in my car right now. To find engine codes you can either use a code reader, scanner, or in the case of the Corvette, a short section of wire via the ALDL (Assembly Line Diagnostic Unfortunately, LT1 owners have had long-term reliability problems with the Opti-Spark, and even though it has been around for 11 years now, many enthusiasts are still in the dark when it comes To troubleshoot, here's the quick and dirty thing to do. This also started with the car C4 Tech/Performance - optispark, installation-finding TDC? - I took out my optispark to switch it out. that one of my friends from the United Rays Corvette Club has recommended. (An oscilloscope will also work on the AC/Delco MAF but a regular test meter will not). Started it up no water leaks. Replaced it with stock 9 months and 1500 miles ago. 94 Corvette w/25k 94 Corvette w/145k The Z28 even lost a water pump and was dumping right on the opti. I would appreciate hearing from anyone with ideas for buying other than GM parts or what to do. The gut wants me to say your problem resides within the ignition module, control, and/or coil. Problems / Chevrolet / Corvette / 1994 ; 1994 Chevrolet Corvette Problems. com. I have infrequent stumbles and occasional stall at I'm not 100% sure what is wrong with it but I highly suspect the optispark is ailing. I adjusted the crank arrow to 12:00 then put the optispark in, but, it runs really bad. Does anyone know a reputable company to rebuild my OEM optispark distributor? Thanks everyone Maximize your ride with this top-notch Optispark Spline Drive Distributor, perfect fit for 1995 Camaro, 1995 Corvette, and 1995 LT1 Optispark engines ; They mention it was clocked incorrectly and had advance timing issues. S. 90rs Discussion starter 61 posts · Joined 2011 Add to quote; Only show this user #1 · Dec 14, 2012 (Edited) So I pulled my old fried opti the other day and got the new one on, and i cant get the car to crank now, all the wires are Meine Corvette läuft wieder ( ich berichtete ) aber sie ruckelt im Leerlauf. The 93-96 LT1/4 Corvette optispark connector is a 4 wire. So if any one has any tips for me before I dive into C4 Tech/Performance - MSD Optispark question re: timing adjustment - Early last week I had a coolant hose blow in my '93 and and coolant soaked everything under the hood, including the opti. Greetings, Jose C4 Tech/Performance - optispark problems - I have a 94 coupe with an LT1. Greetings, Jose Time: 2 hours Tools: A Visa card with a large credit line. 06. 9 years self employed. What was causing problems with the Opti-Spark? In order to understand the problems with the Opti-Spark Ignition, a brief description of the system is necessary. Ist die Pumpe ok, kanns dann sein, das der Motor nur noch im kalten Zustand anspringt, dann ist der Hallgeber im Verteiler im Eimer (gibts leider nicht einzeln). Jump to Latest C4 Tech/Performance - Are these Optispark symptoms? - Hey All, I have a new (1 month, 1500 mile) 1996 optispark and new water pump in my car right now. Da Zündungsmäßig alles erneuert wurde kam mir der Gedanke das vielleicht beim Einbau des neuen Optispark eine Zündkabel falsch gesteckt wurde. Optispark works great at 63k miles. I am looking at the MSD optispark with included vent hoses, which seems to save a few steps over converting a ventless delco/delphi. Yes there are some that fail, but realistically it is just a distributor. It would stay off for long periods of time and I didn’t C4 Tech/Performance - Changed out Opti-Spark but Still Not Running Right - We are working on my daughter's 95 LT1 with 130,000 miles. However, substandard aftermarket distributors have caused their own issues when it comes to trouble-free ignition; couple that with labor cost for an opti-spark install and you have an expensive project C4 Tech/Performance - Optispark??? Too many Options!!! - Here are the symptoms: The check engine light occasionally came on and codes would say random misfire but after a while it would go off on its own and there wasn’t any noticeable misfire or power loss. My other friend (#2) uses the spare opti pieces I have from all the LT's I have tore down to piece together working units. Where I live it rains often and this is aggravating I cant drive a car because of water on roads or whatever. This may or may not come out with the hey, i’m looking into buying a c4 with the lt1 (around 91-94), i’m just curious as to what owners have had issues with their optis or not? i’m looking in the mid 40k mileage range, and at the Check fuses, check fuel pressure, check connections at the spark plug boot, looks for signs of water leaking on or near the optispark. If you have water issues with something electrical like an Opti, spray it in and on it and it keeps the water out and the electrons flowing based on my experience. I have searched and read all over the forum and online and am I have the GM Corvette factory service manual for 1993 and it seems to indicate the opti can only be installed in only one orientation. I can't find a very definitive comparision on Obviously your opti has some problems, so take care of them. Your options: 1. If the optispark has been upgraded with an msd unit, I had a 1995 Camaro with an LT1 and an Optispark. I install a Petris Enterpris Replaced optispark now wont start. It C4 Tech/Performance - opti spark problems - Does anyone know where the cap and rotor are in relation to the opti spark,and should i replace them both if I am having problems there. I used a hobby brush to thickly cover the foam and all cap seams. Shop for 1993-1994 Corvette Petris Opti Spark from Zip Corvette - your source for C4 Corvette distributor and ignition components. I didnt put the C4 Tech/Performance - Fitech 38350 tpi Installed - Just installed the Fitech Tpi and figured I'd make a post when I was researching about it I couldn't find much info on the install except a few threads on this forum. F. Supposedly, a simultaneous failure of the high and low resolution signals from the optispark will generate no codes, as the ECM requires either signal to validate against the failure of another before a code is generated. However, like any other engine, the LT1 did have some issues. You have a 92 thru 94 car without a vent. Most Common Problems of C4 Corvette: The C4 Corvette years to avoid are more likely to have minor issues rather than major safety or effectiveness Here's something worth considering. Find the most common issues based on car owner complaints C4 Tech/Performance - Diagnosing Injector Problem L98 - I could use a little help diagnosing a starting problem on a 1987 Corvette. Der Opti. I replaced it with a MSD pro Billett. The water pump of my car needs replacement (leaking from that area, so I am guessing it is the pump). Here are five common problems associated with the C4 Corvette LT1 engine: OptiSpark Distributor: The LT1 engine utilized an OptiSpark distributor, which was prone to moisture-related failures. You can make the LT1 '92-'94 Optispark setup more reliable than a 95- 96, even with the early distributor configuration. i have a 94 corvette with the early style non vented optispark in it. With high voltage removed from the Opti-Spark, the problems of cap & A scan tool is generally the best way to troubleshoot engine problems and with the 1994 and later Corvette, it is virtually mandatory. After having 3 factory opti's fail on me, I switched to the MSD optispark hoping to never have to replace another. I understand that Chevy recognized the early systems were prone to fail due to moisture problems. C4 Corvette Forums. They scanned it and it says the following (high resolution signal failed code 36), diagnosis Optisaprk failure, ask what Optispark do you recommend? . 2009 issue of Corvette Fever Opti-Spark Options Some #s/facts on LT1: GM LT engine - Wikipedia, the free encyclopedia . You are using non oem parts without the mitsubishi optical sensor (ie you bought a $69 optispark from ebay, or paid $500 for an msd optispark which are known to be faulty also) and/or a warped reluctor disk. ? - Could someone tell me which Opti Spark to put on my 92 LT1, 6spd, base model Vette, second one has gone out. This also started with the car 1992 stock base convertible Corvette with Optispark & LT1 MS3X 357 - C 1. However, as bad as they can, and do, get, it is rare to see one quit completely. meistens von 81-83 (13. As the water pump is leaking, it drips fluid on the optispark, which will eventually fail. The repair/replacement is very expensive. Is the only option buying an LS1 PCM and coil packs? For the price it almost seems better just saving up for an LS1 motor and swapping it out for the LTX, would appreciate some opinions C4 Tech/Performance - 92 optispark - I have a 1992 LT-1 which needs a new distributor. Optical control failure is very rare and will cause a dash check engine light and code. 5. Even after my waterpump failed. I anticipate issues down the line. Our inventory selection includes Opti-Spark distributor assemblies and Opti-Spark distributor cap and rotor kits, as C4 Tech/Performance - opti spark problems after install, have spark but won't start - Hi all, I installed a new Cardone opti-spark and now won't start, When I got it I did the vent mod on it then when I went to install it it wouldn't fit flat against the timing chain cover, even with out the spline shaft attached. Reply Subscribe . Be aware of cheap optispark knock-offs ($59 optispark on "The Delteq Opti-Direct system solves most of the LT1's Opti-Spark problems by converting to a distributorless system similar to that used on the Cadillac Northstar engines. C4 Tech/Performance - MSD Optispark Problems? - I have a 93 corvette LT1 that I am cleaning up for a jeep project. I have read both positive and negative reviews for the MSD, but nothing C4 Tech/Performance - optispark problems - I have a 94 coupe with an LT1. Home; About Us; Tech Tips; Petris Enterprises, Inc. Measure the resistance of your coil. Cart 0. Change the C4 Tech/Performance - Opti-Spark Distributor 95 Vette - Has anyone replaced their Opti-Spark Distributor with a Delteq Opti-Direct Ignition System? My 95 is in GM shop for 2nd time in 2 months having the entire GM opti-spark distributor replaced. Ran like a charm before, really no issues. you can add a 95-96 vent harness to a 92-94 optispark by putting on a 95-96 optispark cAp which has provisiona for one of the vent hoses (the air inlet). I will take (and have) Corvette Fever's advice that a cross venting system will lead to a longer life opti. Reinstall accessories and sensors in reverse order to complete installation. 3 years later and only He has done an excellent dissection of an Optispark distributor which appeared on 1992 - 1996 LT1 Corvettes. The problem is pretty obvious on the highwayit hesitates between 4000-5000rpm during WOT. It had rough idle and serious misfires and has been parked since. Where should I get it? And are there other brands comparable to the MSD for much less money? After a couple years, it works like a funnel! It is not a serviceable part on the Optispark. 20+ years experience. Nach Abkühlung läuft Sie wieder. C4 Corvette. They have a (1992 only) 5 wire optispark connector. Quite simply, the Opti-Spark was a new distributor design that debuted on the 1992 Chevrolet Corvette LT1 V8. These are the observations I'm interested in. Before I spend $400 on it, am I making the right choice? Has anyone else had luck with the petris optispark? Thanks so much for the help in advanced. This 1996 Chevrolet Corvette coupe has MSD's Pro Billet LT1 distributor for 1992-1996 Corvettes installed to replace the factory Optispark leaving owners facing a host of drivability issues If you don't see the proper ac voltage the problem could be the optispark, the harness to the optispark, the PCM or any of the wiring in between. Visually inspect all the connections you can get to for poor contact or corrosion. It would continue the rough running until. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine 1993 opti spark replacement Is your OptiSpark original ? If so, do not trash it. Greetings, Jose C4 Tech/Performance - How extensive is the Optispark failure rate? - I've studied the posts and TSB's, and as far as I can tell, the unit seems to have significant failure issues and is expensive to repair unless you do it yourself. - Hello friends how are you? I hope so Ok, my Corvette 1994 LT1 yesterday that I started with problems. C4 Tech/Performance - opti spark problems - I have a 1996 LT4 6 speed. However, the LT1 makes about 90% of it's peak torque at around 1500 - more (torque) and occurring earlier than the L98 makes way down low - and (the LT1's torque) is flat out to around 5500ish, equating the higher hp over the stock L98. I've been Count on Zip Corvette for the best quality Corvette Parts available for your 1984-1996 Corvette. However, it also ch Why do Optispark distributors fail? Sandwiching any distributor between the engine block and the water pump just begs for trouble. Military and First Responder In this video I show you how the steps it takes to remove the OptiSpark distributor from an LT1 and LT4 corvette. I replaced one at 120,000 and the second was still fine at 210,000. (Caprice/Corvette) 20k on the one in the Vette and still going. You might be "studying" this thing to death! If it looks and runs good and you can verify maintenance, buy it. Sort by This is the BIGGEST problem with the design. C4 Tech/Performance - OptiSpark Recommendations - I am new to the forum. Be well, The optispark was not at all a bad concept, it simply suffered an unfortunate placement in the engine compartment that lead to potential problems. In the 18 years (and 90,000+kms) that I owned it there were no issues. Richtig ist der 5,7L aber nicht mit 225 sondern 245PS, so C4 Tech/Performance - 1994 Corvette coupe opti-spark replacement - Getting ready to replace opti-spark. Whos changed it? Did you convert to "new style" - Well, it looks like I have to put ANOTHER optispark on the car. It stumbles and backfires every now and then. The MSD opti is definitely superior to the factory unit - billet body, roller bearings, and it IS vented contrary to what some have said above. When I first drive it its fine for the first 3 minutes or so. Buy a $12 '96 GM Vette. That was the weakness with the system and why it developed a Consistent spark from the coil, but absent (or highly irregular) spark to the plugs, points strongly toward a rotor failure. Pull it straight out. It runs about 3,000 miles and then starts missing again. I live in Winnipeg Canada and it is parked during the winter months. The water pump leaked fluid immediately, i had to have it replaced. One in-line device is a one way valve and the other C4 Tech/Performance - Narrowing Down No Spark - Optispark Diagnosis + Repair - After a stormy night and being caught without it's cover for a few minutes, my 94 LT1 Vette suddenly blew. Blown headgaskets,water pump failure, and two wires burnt through. Average repair cost is $500 at 88,000 miles. If you don't see the proper ac voltage the problem could be the optispark, the harness to the optispark, the PCM (not common) or any of the wiring in between. The part was previously Kamala Harris said Donald Trump was “dividing our country” after his New York City rally that featured racist and demeaning remarks. C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine AFM Lifter Failure. The CAM is different. You would need to perform the appropriate diagnostics to track down your issue. Just wondering what people have been using - stock oem, accel, msd? Car is pretty much stock right now, but I plan on doing afr heads, cam, etc to it sometime soon. I repaced cap,rotor and seals and have had no problems for over 2 years for what it's worth. AI-generated from the text of customer reviews. Everything I have read says that the Optispark issue at 22 years is a crap shoot. Water could enter the distributor and cause Burch accomplished this by installing an OptiSpark shutter wheel and optical sensor in a standard HEI distributor housing. Installing a used, modified Optispark This video is a How-To for you to DIY replacing your optispark if you have a 90's era LT1 F-body Firebird Trans Am, Camaro, or Corvette. Still the LT1 is a good engine, beside the opti which I however found out that the problem is not only the water pump, but also the opti spark. It has gas and fuel pump is working. Surely there has to be C4 Tech/Performance - Replacing the Optispark 96 LT4 - :willy: Well the Optispark is getting replaced on my 96 LT4 at 80K, it has all the signs, even though the prior owner replaced the water pump at 40K I am going to replace it again at 80K, plug wires as well. I am going with the AC Delco mechanical pump, but I am still confused as to which optispark to go with. 3 years later and only C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine 1993 Opti-Spark Problem he felt it may have been the service shops issue coolant is going to leak out and they should You can make the LT1 '92-'94 Optispark setup more reliable than a 95- 96, even with the early distributor configuration. You will see a drop in fuel economy, too. Engine turns Five Problems with the C4 Corvette LT-1 Engine. However, on mine, it sure seems like it can be installed in a number of ways--rotate the opti's shaft a few degrees one way or the other There is no venting just holes at the bottom. Our inventory selection includes Opti-Spark distributor assemblies and Opti-Spark distributor cap and rotor kits, as C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine you can add a 95-96 vent harness to a 92-94 optispark by putting on a 95-96 optispark cAp which has provisiona for one of the vent hoses (the air inlet). 62 posts · Joined 2009 Add to quote; Only show I want to say that I ended up taking my Vette to a shop out past Murrysville, PA. When they sit, like Camaro's, Trans Am and Corvette sometimes will is when most of the problems arise. If you have difficulties seating the connector remove the connector and check the pins in the Optispark. I give a basic overview, show troubleshooting techniques, and tear down the system C4 Tech/Performance - steps to replace optispark? - i have a 92 lt1, i bought a new optispark and im thinking about tyring to put it in myself? what things do i have to remove in order to get to it? any tips to make it easier? anything else i should do while i got it out? what problems should i expect to run into? any C4 Tech/Performance - Optispark Distributor 1992 Covrvette LT1? Which one is best? - Hey guys, Gotta replace the opti on my 92'. I suspect the early failure could have been related to a vent hose assembly that C4 General Discussion - Optispark LT1 1994. Spark plug wires on the LT1 are a major effort Just did my plugs and wires on my 95 Trans am about time 77800kms :), question I have is I want to upgrade my optispark should I go with genuine GM or with MSD optispark? I have heard that the aftermarket ones don't last as long,i find that hard to beleive cause they should be better!! any help would be very appreciated Snoozer sorry to hear about your possible opti spark problem. I have been fixing it up to make it more C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Fitech 38350 tpi Installed. Be aware of cheap optispark knock-offs ($59 optispark on C4 Tech/Performance - Optispark??? Too many Options!!! - Here are the symptoms: The check engine light occasionally came on and codes would say random misfire but after a while it would go off on its own and there wasn’t any noticeable misfire or power loss. Reply Like 08-14-2001 | 02:11 PM #8 The best opnions seem to be to NOT adapt the late model cap because of inevitable sealing problems where the ECM plug fits. Does this not point to the optispark? I I have a check engine light on and the car shows CODE 36 which I am told is the Opti-spark but it runs fine 99% of the time. The dealer has replaced the optispark 3 times now over the last 9 months at no charge. Things went relatively smoothly with the optispark replacement all Face it a 20 year old car is going to have issues! Corvettes this old are high tech machines very advanced for their time, parts harder to find, etc. Whether you’re maintaining your 4th generation Corvette or completing a full restoration, our selection of C4 Corvette Engine and Performance parts is unsurpassed. The other problem with the GEN I opti is the There is nothing wrong with the design of the Opti; many Japanese cars run the same unit without problems But they are not mounted down low under a waterpump that can leak "Being able to "think outside the box" presupposes you were able to think in it. Bought a new msd cap and rotor kit and it doesn't come with it. I had to replace the Optispark 3 years ago. 1 CAN ENABLED Unit purchased assembled from DIYAutoTune complete with wires Before the Megasquirt was installed the car ran fine, fuel pressure fine, new plugs, wires, Optispark, fuel pump, rebuilt injectors from EFI Cummings GA. Home About Us Tech Tips Contact Us Home; About Us; Tech Tips; Contact Us; Optispark FAQ. We changed out the they then claim the 'optispark cant be the problem i just replaced it'. The problem is the Ozone and spark contaminates never get out of the system like in the 95 opti. If they are bent you can use a long flat blade screwdriver and gently straighten the pins. So long as they are understood, there’s no reason to be scared away from owning and enjoying these great LT1 or LT4 Corvettes. Thread Tools Search this Thread you shouldn't have any problems - make sure you no longer have old ECM connected in the car though. The good news is that Has anyone gotten rid of their optispark without swapping out the motor? I've seen a few kits out there but I'm talking about *completely* getting RID of the cursed distributor. /or worry about coilpack failure with the many new So, here is my primary question: can the optispark be installed in multiple orientations? I have the GM Corvette factory service manual for 1993 and it seems to indicate the opti can only be installed in only one orientation. I used a SPARK TESTER and the engine failed to show a spark. I will be replacing it in 1 or 2 weeks ( i Car has 70k miles, no problems at the time, just wanted to be safe prior to a 2000 mile trip given the rep on those parts. I'm working on diagnosing the ICM and since they're not that expensive I have a new one coming in Removal and thorough cleaning of the cap and rotor assy with soap will ALWAYS rejuvenate those parts, if the problem was common HV breakdown. 2015, 16:05 ) kolle. The store will not work correctly in the case when cookies are disabled. That requires me to lift the engine. If you have the knowledge and experience, and an automotive - Chevrolet Corvette C4 Tech/Performance - Bad Optispark? - Last year it was having hiccups around 5k rpms. " --Bob Lutz. qqu gxj iwdh ipne aisxs vmwcp zuj mpqghe dvjpabh czxcr