3.5L. After driving a few miles especially on the highway, the car begins to idle very high, up to 3k rpm if put in neutral or park. If I turn the car off and restart in goes back to normal. I do not hear any vacuum leaks, fuses are ok, new pcv valve. The rpm go even higher if I turn the ac off. No codes/check engine light.
Monday, July 16th, 2012 AT 9:02 PM