this just started this weekend i have a 2001 f150 5.4 temp outside was in single didget started truck to warm up idle about 1000 rpm's put into gear with foot on brake idle increases to 2500 rpm put it into park and stays at2500 rpms no fault codes anyone have a idea whats going on? my first thought is some sensor on transmission telling engine need more rpm's

 

sounds like you got a stuck Idle air control. Probably need a new one. its on the back of the throttle body. Autozone has them for about $50

 

how involve of a job is it

 

Might also be a vacuum leak.

IAC is a strong possibility.

Steve

 

Its not that difficult really