All sorts of things



Vehicle: 2000 F150 V6 4.2, 2WD, manual transmission

Issue: High Idle when in neutral and pulls in 1st and Second
Weird things: when in neutral at a stop, if I depress the clutch all the way to the floor the high idle will go away in a few seconds. Once released the idle stays relatively low. Then once engaged and driven through the gears and coming to a stop again the high idle returns.

Any thoughts?


Idle air control (IAC) motor is my first thought. On the throttle body, controls idle. Easy and cheap to replace.

May also be a vacuum leak that changes with the force placed on the engine when the clutch is depressed. Could be hard to find.


I changed the IAC. It ran smooth for a few months then went back to the high idle.

Collin Slater