i need help! i start my truck and it idles to 1500 then goes back down to 0 and turns off well it wasnt a problem because i could rev it and keep it running but now its doing it while im sitting at redlights does anyone have a clue what this could be

 

when is the last time you changed your fuel filter?

 

it could be the IAC valve to (idle air control valve).... try cleaning it first and see if it helps it any

 

probally may and i know ill prob sound stupid but where is the iac valve

 

on the throttle body....

 

ok thanks ill check it and then tell ya how it goes