Hey guys. Here's the problem... I have a 2001 Grand Prix GT (with the SS M90 kit), and I'm having a random non-start issue. My car will start fine for like 3 weeks straight, no problem, then all of a sudden it won't start. The first time it does it, the RPM will shoot up to 1000 or so, and it will die instantly. If I try start it again, it will just crank, and the RPM won't move. If I hold my foot on the gas, it will run, but as soon as I let off, it dies. Sometimes later that day, I'll try to start it, and it will fire right up. It just doesn't make sense.
I had an issue like this before, and after replacing the spark plugs, fuel filter, cleaning the MAF and cleaning/adjusting the IAC, it fixed it. It didn't happen for a while, then it started happening again. I changed the IAC from my old L36 throttle body to my current L67 throttle body, and it started up right away. I don't know if it was a coincidence or not. It was working fine for a bit, now it's doing it again. It's kind of hard to believe that both my IAC valves from both throttle body's are worn out, but I guess it could be possible. What do you guys think? Thank you.
