I have a 1993 Oldsmobile Cutlass Ciera S sedan with a 3.3L and 109111 miles. I have an issue with the idle. I have replaced the wires, put Bosch platinum +4 plugs in, and replaced the 3 coil packs. I also replaced all of the vacuum hoses I could find. I just bought a fuel injection pressure tester, and I plan on checking the pressure tomorrow. It runs fine when accelerating, there is no hesitation. At cruising speed you can feel a little miss mostly 45-60MPH. Idle though has a very obvious miss or a loping to it, it does this when it's cold or warm. It feels sometimes as if the idle gets too low and then the IAC kicks it up a bit. Is it a bad IAC, TPS, Mass airflow sensor possibly? I have no codes showing up at all. I also bought a can of cleaner for the mass airflow sensor, specifically for delicate electronics. I plan on doing that tomorrow too.
I have a strong mechanical aptitude for car repair, I went to a technical college for suspension, brake, and minor engine repair, but never made it through the ignition/fuel/emissions control part as the school closed down in the middle of my schooling.
Any help will be appreciated.
have the same problem?
Tuesday, February 20th, 2007 AT 9:19 PM