Engine Performance problem
1999 Ford F150 V8 Two Wheel Drive Automatic 96500 miles
My F150 started idling around 3000 rpm at start-up and stops. The local garage installed an air-idle control. This helped for awhile, then it started again, sporadically. Since they couldn't duplicate the problem at that time, they replaced the same control again for free. This solved the problem for several months. However, now at start-up it seems to be starting it again, although not as severe. It only runs at around 1500 rpm at start-up, then slowly idles back down to the typical 850. So far it hasn't over-idled at stops like it was before. Any suggestions other than replacing the air-idle control again? Thanks.
Monday, July 7th, 2008 AT 2:32 PM