I have a 94 Corvette 6 speed coupe. The previous owner added stainless long tube headers and exhaust, along with suspension mods. I replaced the clutch and shortly after that it began to quit running. No warning. It's just running one second, and then not. Sometimes it will start right up again. Sometimes it might take an hour or two. When it is refusing to start, it has no power to the fuel pump, and it has no spark. I hooked scan 9495 up to look in the computer. Everything jumps all over the place. Knock counts go sometimes to 50,000 and then right back to zero. No DTCs, then the whole page is full, then none. It's not storing any of them. That's just two things. I'll be happy to post the log if someone will tell me how.

 

Try a corvette page for better results

 

It's funny, but all of the Corvette forums say that for tuning, thirdgen is the go-to place. When it comes to tuning, thirdgen has the best reputation.
I know the body control module can sometimes cause difficulties, but what I'm seeing is completely ridiculous.

 

Thridgen.org is a great place for tuning help. This doesn't sound like a tuning issue. Sounds like an electrical system issue or faulty computer.

 

You could try https://www.camaroz28.com/forums/lt1...engine-tech-9/ .

 

I think you're right about that. Right now, I'm trying to use datalogging software to help pinpoint the issue. I'm really, really hoping it isn't the opti.

 

Thanks, dlinger. I'll check them out.