I have 1990 Corvette 5.7L Automatic, 22000 mile, that runs fine when I get on the gas but surges on slow idle and almost seems like it's going to stall. Come to a light or stop sign, I have to put it in neutral or park so the idle will be a little faster to solve the slow idle problem. This only happens when it is warmed up and the slow idle drops to 500 rpms when the car stops. I replaced the following parts and the problem still exists:
Coolant temperature sensor
Throttle postition switch
Cleaned the throttle body
Replaced Oxygen sensor
Replaced IAC valve
No codes are present in the ECM. I would appreciate any help you can give me with this problem.
have the same problem?
Friday, July 4th, 2008 AT 7:32 PM