I have a 94 RMW 130K and have not posted here in quite some time. I had to replace the Optispark (not original)
because the plug port on the top had become compromised due to airborne oil residue getting down in there
after the plastic head of the plug had broken and it wasn't sealing well.
After a lot of research I bought an API unit from Sac City Corvette in California, with a 2 year warranty
for around $250(?). Soon after installing it the engine would die when sitting at a traffic light in drive with
my foot on the brake. It was sporadic and only after the engine was warm. It would always fire right back up though,
and when driving, it was flawless. And if I increased the rpm while my foot was on the brake just a little, or put it in neutral or park,
it wouldn't stall. Only in drive, at rest, when the rpm is lowest. This went on for a year and a half because
I was led to believe by a trusted mechanic that this sounded like a vacuum leak. I addressed every component
of the air intake except removing the intake manifold, which is original. Nothing changed.
Each time that the engine stalled the "service engine" light came on but would go out after the car was shut
off and restarted next time. I'm not a diagnostic mechanic. I am just good at taking things apart
and replacing or repairing if someone else tells me what is needed.
So finally, I got the idea to drive to a mechanic with an OBD1 scanner and wait there until it stalled for him
to read the code. Twice I did it and twice it said #26(?)...distributor. I ordered a replacement Opti since it was under warranty
and they were great about it and sent me a new one immediately after receiving the old one.
Put it on, and so far, it no longer stalls. (after one day.....but thats huge!)
I am posting this in hopes of helping other novices like me. Everyone said it didn't sound like an electrical
problem because it seemed related to RPM....turns out it was electrical.
I may not look here again right away at the forum, so if you ask me questions they may not get answered
right away. I just wanted to add to the pool of knowledge of the LT1/Opti issues. Thank you for being here, all
who make this forum happen.