Lt1 Optispark Symptoms, It also seems like the design/layou

Lt1 Optispark Symptoms, It also seems like the design/layout make it susceptible to problems whenever a water Had a bad oil leak and it leaked into the Optispark distributor and into one of the plug wire connectors on the cap. The GM Optispark is an optically-triggered ignition distributor used on the LT1, LT4 and L99 engines. As heat builds under the hood you first notice a minor misfire, then stalling occurs. Find all the details inside GM High-Tech Performance Magazine. I paid 239. Jun 17, 2013 · New scenario for Opti Ok gents adding to help others. Oct 15, 2014 · Here's the deal guys, I had to buy one of these guys for my T/A in march because I couldn't afford an OEM, Accel, or Msd unit. Jan 1, 2025 · The Petris Optispark, built by Throwback Automotive, is designed to outlast the competition with upgraded brass components and a built-in ventilation system to prevent premature failure. I have tested the injector signals with a noid light, tested the fuel pressure (45psi), tested spark at all plugs- all were good. When I got my car,it would float the valves above about 4400. its had a hard life in my Aug 13, 2016 · C4 Tech/Performance - Optispark idle symptoms fixed 93 LT1 - Wanted to follow up on an idle miss that a new Opti took care of. Sep 18, 2011 · 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. Aug 25, 2010 · 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 their car's life, the OPTISPARK! Designed as an UPGRADE to the type of ignition systems which GM became famous for, the general Aug 25, 2010 · 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 their car's life, the OPTISPARK! Designed as an UPGRADE to the type of ignition systems which GM became famous for, the general In this video I discuss some of the options available for replacing your failing option spark. You are most likely able to start the engine back up, but as time goes by the wait time increases before the engine will start. Let it idle again and would shut down again at 186. Jul 14, 2021 · The LT1 is known to experience issues with the optispark system, head gasket failure, PCV valves, coolant sensors, and spark plugs. Just curious what you have personally experienced when you have had one go bad. Sep 20, 2011 · 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 don't even care to make the effort. Eventually the engin Jan 8, 2002 · C4 Tech/Performance - What are the early symptoms of optispark going bad? - My LT-4 has 45,000 on it and seems to drop power when shifting between 1st and 2nd just for a split second. more Oct 24, 2010 · My lt1 in my jeep just stopped running one day, no spark at all the coil is about 1 year old, i swapped my spare coil on and it did nothing. Did not replace the plug wires or the coil wire. The car now pulled noticeably stronger, but still occasionally had a Jan 7, 2011 · This is a '95 rebuilt (never ran) LT1 with new injectors, opti, coil, wires, sparkplugs, etc. Jul 8, 2009 · From my experience there is such a wide variety of symptoms and scenarios that sometimes the opti can be very difficult to diagnose. Jan 19, 2018 · 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 time. Is this what a failing one does? Apr 9, 2002 · Here's the deal. We’re going to discuss each of these problems in-depth below covering the issue, symptoms, and replacement options. So what does that mean for someone who’s looking at an LT1 Corvette as a daily driver? Oct 27, 2003 · C4 Tech/Performance - Please tell me the symptoms of a failing optispark - My 92 is at 102k miles, and I believe it has the original one. Sometimes you get codes, sometimes you dont. I have put on new wires and plugs but I am getting horrible gas mileage (11 MPGs combined) and a slight shudder at . But changing times demand changing designs. If you know of other options or have experience with any of the Apr 29, 2025 · Discover the top reasons LT1/LT4 Optispark distributors fail—oil leaks, overheating, and more—and how to prevent damage before it starts. Got a new cap and rotor and rebuilding Feb 26, 2003 · The common symptoms I have seen and experienced is a high RPM miss, and/or low RPM stumple, and/or seemingly little timing advance (resulting in poor gas mileage), and finally misfire throughout entire RPM range, and also sometimes the car won't turn over. Today I'm going over the optispark ignition system of the GM LT-1 engine. My bad opti caused me problems for months and months until I finally figured it out. May 13, 2002 · C4 Tech/Performance - My Bad Opti-Spark Symptoms - I see this asked occasionally and thought I'd share my experience with a bad opti. Replaced the stock plugs with NGK TR5's, and replaced the coil with a MSD. Any higher than 7000 ohms means you should replace it. Nov 4, 2015 · How do you know the Optispark is failing? Let’s envision you are out in city traffic. The engine turns over slowly and the starter has a high pitch whine. The only bad thing was, the new Opti Harness didn't click into the Engine harness, So Feb 28, 2002 · Gentlemen, What are the symptoms and warning signs that the Optispark distributor on an LT1 is about to fail or is in need of replacing???? My 9c1 has 135k miles on it and I don't know when if ever the Optispark had been replaced. Sep 17, 2024 · If you own a car equipped with an Optispark ignition system, you may eventually have to deal with Optispark symptoms. G One thing I can tell you 6500 rpm is hazardous to the health of your LT1 motor, and the valvetrain may not take that abuse many times. I adjusted the valves, pulled good to redline, but above about 5500 it would have a little bit of a miss here and there. On occasions it might fire right back up but more times than not wouldn't. Checking showed no spark. The Optispark is located at the front of the engine and its main purpose is to distribute spark to each cylinder. I give a basic overview, show troubleshooting techniques, and tear down the system to show what's involved and why it is Jun 23, 2005 · 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. BAD Opti symptoms: Would start and run till engine got to 186 then shut down and not restart. Oct 28, 2019 · Early cars with the optispark had a "non-vented" optispark, newer versions had a vented case which allowed the offending moisture to evaporate before it became a problem. Measure the resistance of your coil. Aug 12, 2024 · I took it to a shop and they replaced the oem optispark with a jegs version, the issue went away for about 2 days then started again and the stalling and hard restarts got worse. Sometimes it sputters off idle. If its around 5000 ohms or so its fine. 5 volts when its cranking over I think the optispark just went out one day. Stock 93 LT1, Auto. The original small-block Chevy (SBC) V8 was built for decades, spanning from the mid-1950s through the 1990s. Increasing efficiency, horsepower, and emissions reduction was the name of the game in the late 1980s and early 1990s, and the camshaft-driven HEI distributor on the SBC was no longer effective. Had an idle miss that started out about a month ago, very slight miss at first that progressed to a very ruff idle mostly felt in gear stopped at a light. Wait a few minutes and it would restart. I Sep 13, 2014 · No description has been added to this video. After checking May 14, 2005 · 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? Oct 1, 2003 · How to make opti-sparks last longer and perform better for LT1 owners. May 10, 2022 · Out of all the LT1 cars I have owned, I have never had one fail. I have 12volts coming out of the coil and 10. The opti can have multiple diseases unfortunately. Try to avoid that if possible. I changed it out this weekend. If I could find it again, I would post up a video of a guy spraying a garden hose (on full blast) directly at the optispark on his C4/LT1 and the engine never misses a beat. The "opti" has two parts, a low-voltage optical section and a high-voltage cap and rotor section. 00$ for the NEW Cardone Opti, and it even came with a new opti harness. vwoo, u0gpr, mccf0, ltip4, ys4hj, 0s7v, bg0ep, mj2d4, wjclz, vtxp,