I just purchased a 1993 F150 XLT 5.0 V8 that has been sitting for about 1 year. It starts fine, but has a very high idle (guessing 1500 rpm). I can find no vacuum leaks and have backed off the idle adjustment screw. I have replaced the Throttle Posiition Sensor- nothing seems to change the idle. I've let it warm up, I've attempted to "kick it down", no change.
Sep 10, 2009 at 11:00 PM