Problem: While in Park after warming up, the idle fluctuates between 400RPM and 1000RPM. Rarely it does the same thing in Drive if stopped, but only rarely.
I've looked through these forums and other places, and while I've found several topics that discuss it, I've only found two solutions:
1. clean the throttle body
2. replace the idle air control valve
I've done both, and the problem persists. I can't find a vacuum leak anywhere either. Are there any other culprits that I may be missing?
I've looked through these forums and other places, and while I've found several topics that discuss it, I've only found two solutions:
1. clean the throttle body
2. replace the idle air control valve
I've done both, and the problem persists. I can't find a vacuum leak anywhere either. Are there any other culprits that I may be missing?