I have a 91 f150 with the 5.0 and a 5speed 4x4 with maual hubs. . when you start the truck; the motor takes a nd minute to find idle and then it reves from 800-1500 rpms till resting on about 800. You can lightly tap the gas pedal and the rpms shoot up to 1500 and hold for a good while. while driving when you disengage the clutch to shift it revs up about 500rpms abouve what they were. (yes, foot is completely off gas pedal) i have replaced the TPS , MAP, and EGR positioning sensor. the AIC sensor looks new. just bought this truck 2 days ago. when i got it; it had a speratic idle and would bogg out at idle, plus what i mentioned here.
Feb 9, 2013 at 12:44 AM