My 1989 F-150 revs up and idles erratically. It only does this when it warms up. It does it worse when it is warm weather. When sitting still in gear it revs up and jerks. It sometimes does go dead. The engine was taken out of a Grand Marquis, but don't know the model.I have changed the m.A.P. Sensor, throttle position sensor, fuel filter, fuel pressure regulator, and I've also cleaned the egr valve and changed the egr valve sensor. Could you please tell me what is wrong?
have the same problem?
Wednesday, February 7th, 2007 AT 7:34 PM