My '95 GT is having a weird problem on start up. This problem came about after some tuning with my TwEECer to get it running right after a head swap (Trick Flow Twisted Wedge heads, Cobra intake, 24lb injectors, stock cam and MAF). I tuned it to run correctly with the stock MAF and bigger injectors. However when I start it after it has been sitting overnight it will idle erratically about 5 seconds after it fires and last for about 20 seconds, sometimes less. It starts to happen as the RPMs are dropping from initial start up and it gets closer to 1000RPM. Then it surges between about 900RPM and 1300RPM for a little bit, then it steadies and idles fine. I have adjusted the IAC and throttle stop according to the instructions outlined in one of the threads here. After letting it finish doing this it'll idle fine and run without any other issues until I let it sit long enough to cool down completely.
Anybody have any idea what's going on at start up to cause that? Thanks in advance!
Anybody have any idea what's going on at start up to cause that? Thanks in advance!