While reading another site(Ford Fans Forever) someone mentioned a problem I have intermittently. Sometime when I start my 2000 F150 with 5.4 motor, it
won't idle. If I start with one foot on brake and other on gas to keep the rpm's up, if I drive around the block it clears up.
I've run code scans and nothing shows up. I have learned to live with it, but.
the other person says his wife sometimes drives it, so it is a problem.
Any ideas?

 

Pull the iac on the back of the throttle body and clean or replace with motorcraft part. It sounds like his is sticking when the truck is cold.

 

Mine did that before and yes it was the iac