Oh Okay sorry about that. The drive-by-wire type (aka electronic) throttle systems do not use an IAC valve. They use the throttle actuator control module and that is on the upper intake manifold.
You say theres a problem with the RPM needle, is the engine racing up and down or is it just the tachometer showing a false reading? If its truly idling irregular then check for vacuum leak in engine compartment and also test spark and fuel pressure
Monday, May 17th, 2010 AT 12:00 AM