LT1 Optispark 1992 !!! No 4th of July sparks in Denver - Corvette Forum
 
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post #1 of 2 (permalink) Old 06-28-2016, 12:23 AM Thread Starter
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LT1 Optispark 1992 !!! No 4th of July sparks in Denver

First time Owner of a vanilla vette, 92, stick, all receipts, no accidents, well maintained, everything works, garaged, etc..., great shape, purchased it $5,000, 105,000 miles. Maintenance paid in last 3 years $4,300 (Opti spark only) plus another routine $1,500 (no problem). Original water pump not leaking (will be replaced this week anyway with new GM parts)

4 Opti spark ignition distributors installed in last 3 years with no end in sight. Appears all due to circuit board issues. Each seems to last about 1,000 miles.

WHY?

ps, , new alternator, ECM rebuild, New GM ICM, new radio, new LED headlights and fuzzy dice before the last two Opti melt downs .
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post #2 of 2 (permalink) Old 11-20-2018, 01:33 AM
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Quote:
Originally Posted by pull View Post
First time Owner of a vanilla vette, 92, stick, all receipts, no accidents, well maintained, everything works, garaged, etc..., great shape, purchased it $5,000, 105,000 miles. Maintenance paid in last 3 years $4,300 (Opti spark only) plus another routine $1,500 (no problem). Original water pump not leaking (will be replaced this week anyway with new GM parts)

4 Opti spark ignition distributors installed in last 3 years with no end in sight. Appears all due to circuit board issues. Each seems to last about 1,000 miles.

WHY?

ps, , new alternator, ECM rebuild, New GM ICM, new radio, new LED headlights and fuzzy dice before the last two Opti melt downs .
Have you thought about getting some heat sink paste and a new (ignition control module) ICM and see if that's your problem. I've read somewhere that some optispark distributors have very little heat sink paste from the factory. This may cause the ICM to over heat and fail. Keep in mind that doing the same thing will probably have the same results. Try buying the paste and a icm and see if that works. It'll be a lot cheaper and maybe a permanent fix. My philosophy is to correct the actual component that is causing the failure. Not just throwing money at a problem. See if this works and let us know.
Roddy

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