there was another thread in here somewhere about idle air control valves, and someone told us about a quick and easy way to recalibrate the ecu.
from what i remember, you disconnect the battery for at least 6 minutes, but some say 15 or so. then you let it idle until its warm, then turn on the ac for about 10 minutes i thinks, might have been only a few minutes, not positive. then there is a certain number of miles you wanna drive it, i think over 40mph. i dont think its any more than 10 miles. but i tried that out, and it reset everything, and idle'd and drove great. If i come across the thread ill try to remember to link it here.
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.