I have a 02 GTP it has 122k miles. Its been running rough and hunting for idle also when I press the gas pedal while in park and release it the car almost stalls but it corrects itself. while I am driving and let off the gas to coast the rpms will drop down to about 700 - 800 rpm then go back up to 1200 rpm. I've changed the maf sensor twice since the stock one went bad and the replacement one also went bad. Also changed the iac valve, lower intake manifold gasket was replaced a year ago. I looked for vacuum leaks didnt find any. If anyone can help me I appreciate it thanks.
