4.6 idle

[marks98gt]

does anyone know whats wrong with my car if it revs up riding down the road ive put a tps in it, and it fixed it for a day or so.

 

[scarface]

Idle air control valve sounds to be the troubles, however, more info is needed...WHat mods do you have?

 

[DropTopPony]

Surging/Hanging idle is common on 4.6's and there is a cheap fix you can try.

read this maybe it can help you out.
http://forums.stangnet.com/showthread.php?t=541046&highlight=hanging+idle

 

[scarface]

the copper plug trick works well also.