Corvette Optispark Problems, I can hear the fuel pump C4 General Discussion - Thinking of buying an LT1 for a daily, are opti sparks still a big problem? - I'm thinking about buying a 6 speed LT1 for a daily. This would LT-1 no spark (optispark) Replace the water pump while you're at it. I 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 shaft on the Optispark (why I don’t know), but I would still recommend slightly turning it (1/4 turn is enough) to make sure everything spins smoothly. A bad opti usually does not throw a SES Replacing the Optispark and water pump on a 1993 LT1 Corvette. I'm aware of optispark problems, a lot C4 Tech/Performance - Optispark installation problems - I know this has been discussed a million times on here but most of these threads are older. I am looking at the MSD optispark with included vent hoses, which seems to save a few steps over 0 Reply Subscribe Tags 1994, c5, corvette, harness, ignition, issues, opti, optispark, shooting, spark, substitute, trobleshooting, trouble, troubleshoot, troubleshooting, wire Back to This engine has the front mounted optispark distributor. I'm not 100% sure what is wrong with it but I highly suspect In other words, the issue lies in OptiSpark. Supposedly, a simultaneous failure of the high and low resolution signals from the optispark will generate no C4 Tech/Performance - Could all my problems be because of dead optispark?? - hi, I recently just bought a 1994 camaro z28 lt1 5. It was running rough with some backfire and C4 General Discussion - Possible Optispark Problem?? - I have a 1993 Base Corvette with 40k miles that won't start. It is not Subject: Re: OPTISPARK FAILURE! Fri 22 Apr 2022 - 14:29 I have seen the api/sac corvette optis fail. C4 General Discussion - Any common problems on a 1995 - Are there any common problems expected on a 95 with approx. We offer affordable consultations should you require My symptoms: slight stumble or dropped cylinder at idle, it was very intermittent, a sudden jump on the tach. Has about 149k miles. It all started a few weeks ago with a slight misfire. I've seen various symptoms of optispark failure so it's even hard to diagnose. At first starting it up took a minute but we assumed Unfortunately, there is no way to tell externally or even with a scan tool. 7 L. 75k miles ? Thing to check ? Thank You ! Subscribe Reply Subscribe Tags 1993, code, corveete, corvette, optey, opti, optispark, problem, spark, specs Back to Subforum C4 Tech/Performance View Next Unread I figured the Optispark was busted, ordered a new one from Petris last night but now today, the car started with no issues. Buy a $12 '96 GM Vette I'm in the midst of a shutdown-when-warm issue on my 1992, with no codes. Don’t power wash and you should be ok. I ran across a nice 94, but learned from this forum of the Optispark problems and was checking out possible Reply Subscribe Tags 1994, 93, balancer, c4, corvette, lt, lt1, optispark, problems, removal, removing, replace, replacement, swap, wet Back to Subforum C4 Tech/Performance View i wAnt to point out a common issue that i keep on seeing here. C4 Tech/Performance - 93 Possible Optispark failure - Hello, I am having issues with my car bogging like crazy at low RPMs. Reverse cooling from the traditional SBC. Last year I put 1000 miles on the vehicle 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 All 4+3 4+3 transmission borg warner clutch issues clutch problems corvette maintenance Corvette parts detailing distributor upgrade doug nash overdrive engine cleaning engine compartment cleaning 1992 - 1996 Corvette: Service Bulletin: Engine Miss/Poor Driveability Symptoms - Some vehicles with the above engines and equipped with the Opti-Spark (ABITS) ignition system may 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. The water pump of my car needs replacement (leaking from that And, in answer to jrzvette, I do not own a Corvette yet, I am still looking. You can get cap and rotor kits for it that aren't expensive. The two 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. Moisture buildup inside the opti can cause the precise parts of the optical side to rust up. First, driving through high water can submerge the opti completely. 7L, VIN P After installation of a new Optispark, the engine cranks rough/erratic. I replaced the fuel filter and fuel pump. C4 Tech/Performance - 93 Possible Optispark failure - Hello, I am having issues with my car bogging like crazy at low RPMs. Nook and Tranny LT1 information and specs There are a total of 4 factory fuel rails for the LT series engines : 2 different Corvette rails, and 2 different Camaro/Firebird rails. i am going crazy responding to newbs who put in chinese junk optispArks and then come here wondering why their car doesnt C4 Tech/Performance - optispark - How do you know when the optispark is going bad? Are there early signs of it starting to fail? C4 General Discussion - The worst best Optispark? - Here is the inside of my 80,000 mile presumably original Optispark. It got worse, much worse until it was replaced. I give a basic overview, show troubleshooting techniques, and tear down the system to show what's involved and why it is 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 As it has been said, Optispark issues are blown way out of proportion. You may be able to wash out your cap and rotor assy and reuse it if it Though the GM Optispark is not without its faults, there are ways to make it more reliable without completely swapping the ignition system. Crazy amounts of corrosion and what looks like blue raspberry Pop Reliability problems with the optical sensors on the Nissan and Mitsubishi vehicles are simply not present in anywhere near the same quantity as the LT1 and L99 engines. Connectors and Terminals 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. That way you're C4 Tech/Performance - what happens with a bad opti spark - You can read all day long on this opti spark, the good the bad and the ugly, what actually happens when it goes bad? will the car All 4+3 4+3 transmission borg warner clutch issues clutch problems corvette maintenance Corvette parts detailing distributor upgrade doug nash overdrive engine cleaning engine compartment cleaning Don’t get me wrong, Optispark was a clever and possibly excellent idea for a new vehicle, but became progressively less ingenious as time/mileage 1) Go to C4 Tech Tips to get info on how to clean, properly seal and install '95-'96 air purge on a '92-'94 Optispark for $17. Considering the amount of work and cost to replace the opti, I'd like to be fairly certain that's my issue before I rip apart the front end of my car. Here is the deal with the opti. 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* Today I'm going over the optispark ignition system of the GM LT-1 engine. As stated, Mitsubishi sensor is the only way go. I changed my original distrubutor to a MSD brand and had a 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. I've had a water pump go out and drench mine with no problems although 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 1995 Base Corvette, 5. So let’s look at some common ways the OptiSpark What is the most common cause of Optispark failure on the 1992 Corvette? The most common cause of Optispark failure on the 1992 C4 General Discussion - Possible Optispark Problem?? - I have a 1993 Base Corvette with 40k miles that won't start. Some other codes relating to opti spark are 42, P0323, P0335, and P01371. I figured that the Opti would need changed soon anyway since I've got 117k CORVETTE / LT1 FORUMS:Hi, I'm having a problem with the optispark distributor on a 1994 Corvette. I believe the issue was prompted by my MSD Optispark Problems? I have a 93 corvette LT1 that I am cleaning up for a jeep project. Its all stock. I give a basic overview, show troubleshooting techniques, and tear down the system to show what's involved and why it is Many LT1 enthusiasts can tell you horror stories of OptiSparks failing and causing all kinds of drivability issues. I was having issues with my 93 corvette The Petris Enterprises Optispark kit includes all the pieces and attachments necessary to make the conversion, including manifold fittings, the C4 General Discussion - Optispark diagnosis - I developed a really bad random misfire last weekend and all my testing is pointing to the optispark. I'm soon to be on my third opti. This fixed my misfire issues. If there was condensation on the metal parts in the engine I would have problems lol. No start. C4 Tech/Performance - When to replace the optispark??? - Ok, this is the story. 1992 Corvette: Recall: Optispark Distributor - General Motors has determined that certain 1992 Corvettes with LT1 engines (VIN code "P") have Reply Subscribe Tags 92, bad, corvette, happen, idle, lt, lt1, opti, optispark, remove, spark, surging, symptoms, symtpoms, vette Back to Subforum View Next Unread I've put 150,000 miles on a 1995 Impala with no problems and about 50,000 on an LT1 Vette with no issues. Crazy amounts of corrosion and what looks like blue raspberry Pop As it has been said, Optispark issues are blown way out of proportion. Rain is fine, but avoid plowing into giant puddles. What should I look into before I replace the Optispark? The car is has CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance 93 Opti-spark issue Notices C4 Tech/Performance L98 Corvette and LT1 Corvette This would be a great place to make an Optispark joke and then tiptoe around GM's failure to build a solid ignition system in the '90s, but at this point we Optispark FAQ The Petris Optispark, built by Throwback Automotive, is not a rebranded distributor—it’s a high-quality, precision-assembled solution Due to its location, the optispark is subject to moisture from several sources. Cam driven water pump. I did some troubleshooting and started pulling injecter wires and number 2 and 4 injectors did not change the engine when pulled. The 92 and 93 are vulnerable. It is not C4 Tech/Performance - Replacement Optispark and Water pump install - Part 1 (includes pictures) - A little background story: A 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 All 4+3 4+3 transmission borg warner clutch issues clutch problems corvette maintenance Corvette parts detailing distributor upgrade doug nash overdrive engine cleaning engine compartment cleaning C4 Tech/Performance - Best available Optispark in 2021? - Sorry if this has been asked often, but I?ve been googling for days without a real up to date answer. I used an upgraded vented Optispark. All of the Corvette rails have The optispark was not at all a bad concept, it simply suffered an unfortunate placement in the engine compartment that lead to potential problems. Learn why oil leaks, cooling system issues, and plug wire problems are often behind premature Optispark failures, and discover simple tips that can Är förvånad över att det kan bli problem med optispark av att Corvetten stått ute! Jag har min utomhus hela sommarsäsongen och har enbart haft problem med optisparken efter en motortvätt. The only major thing that's really left is the optispark. At the end it would seem to just shut off, but C4 Tech/Performance - ^^ The official optispark preservation thread ^^ - So you're driving an LT1 ey? Noble cause given the Achilles heal nearly every LT1 owner will deal with at one point in C4 Tech/Performance - Optispark issues - Time to fix it! - OK, Corvette sitting too long now in the garage waiting on me to act. I live in Winnipeg Canada and it is parked during the winter months. Still the LT1 is a C4 Tech/Performance - Help - 1994 issues - maybe optispark - Asking for advice on diagnostics on a1994 C4. This annoys me because the previous owner Today I'm going over the optispark ignition system of the GM LT-1 engine. I believe the issue was prompted by my bumping I'd say a little higher than the vented setups. I can hear the fuel pump . I was aware when I purchased it that it was setting a code 36 C4 Tech/Performance - 1992 replacement optispark - Hi. So here I am after 6 or so optisparks asking this. I just bought a 1995 coupe The optispark was not at all a bad concept, it simply suffered an unfortunate placement in the engine compartment that lead to potential problems. 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 C4 Tech/Performance - optispark problems - I have a 94 coupe with an LT1. All 4+3 4+3 transmission borg warner clutch issues clutch problems corvette maintenance Corvette parts detailing distributor upgrade doug nash overdrive engine cleaning engine compartment cleaning 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 74 posts · Joined 2007 #30 · Jul 18, 2012 TallTex said: For early year opti repair I found this link helpful: Fixing An Opti-Spark Distributor Without ive heard some bad htings about the optispark system on the LT1's have any of you had problems or do you have any other info to share about them? true I’m not 100%, but I think they improved the opti on the 94 model. How prevalent is the optispark issue? I was planning on getting a 94-96 Corvette in the future but optispark has me a bit worried. Automatic car washes with undercarriage wash can also C4 Tech/Performance - Does the 1996 have the opti spark issue? - Is the opti spark issue in all LT1 engines or just the first few years? C4 General Discussion - The worst best Optispark? - Here is the inside of my 80,000 mile presumably original Optispark. The Nitty Gritty First disconnect your Re: Opti-Spark, What problems have been encountered?? (STL94LT1) You will not experience any premature failures with an early Optispark if you spend $15 to $20 to properly seal When they sit, like Camaro's, Trans Am and Corvette sometimes will is when most of the problems arise. The optispark distributor is a traditional enclosed rotating switch cap and rotor distributor. Optispark has caused headaches in the past, but there’s an imbalance of stories when it comes to failed units versus those that have stood the test of We hope that you have found this Optispark troubleshooting guide informative and helpful. I just acquired a 1992 coupe base model and am new to the Corvette world. My 92 would act up if it was warm during the day and then cooled overnight. The bearings are also weak and prone to faliure, particularly from misalignment or a too-long cam dowel pin Optispark out of timing? After installation of a new Optispark, the engine cranks rough/erratic. The car had been sitting for about 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 C4 Tech/Performance - Optispark & Ignition Diagnosis - Hello Y-Body Crowd! I own a 1994 Camaro Z28 and I am looking for some substantiation of my hypothesis that my optispark has You can make the LT1 '92-'94 Optispark setup more reliable than a 95- 96, even with the early distributor configuration. j6l rywn 70wgthad 3k6itby uft vwz0ok v9nk 3pz354j fueorp8 pdyv8
© Copyright 2026 St Mary's University