I have a 93 Chevy van with 97000 miles and a 5 liter engine. Recently the
check engine light came on with trouble code 35: "Idle Air control system".
I replaced the valve, reset the computer and the same code comes on again
(usually when pulling over and idling after driving on the highway). I am
stumped. Can anyone figure out what the problem could be? I checked the
vehicle speed sensor and it's fine. One possible clue is that the cruise
control also stopped working. Also, the engine always surges for a while
before idling at the proper speed (like when braking for a red light). These
two clues may be completely unrelated. Any help is very much appreciated.
Karo: m email@example.com