I have a 97 GTP with about 130,000 miles on it. Recently my car has been ideling at about 2000 RPMs all the time. I took it in to get fixed, and the shop said it was the gasket between the supercharger and the intake manifold... They wanted $300 to replace it, so I did it myself insead. After I got the new gasket on and got everything put back together I took it for a test drive. Everything seemed fine except it was still ideling way to high. So I started checking forums, and I saw someone suggested it might be the MAF or the TPS. So I took the MAF off and cleaned it, replaced it, started my car, and it was still ideling high. I shut the car off, and tried simply unplugging it. The car started fine again, but was still ideling high. So after that I plugged the connecter back in and now it won't start. It turns over fine, it just won't fire... I also just put a new PCM in, but I tried starting it with both the new one and the old one with no luck. Any ideas?

Have you removed the IAC to see if its all carboned up?

Push on the throttle a little bit and try to start it.