Re: Question about 1994 f-150 5.0
Sounds like it could be a vaccuum leak, they can be tricky, but the best luck I have with them is to use carb cleaner (3M safe for coated throttle bodies) and spray around all vacuum lines, throttle body and intake to head mating surfaces. If the idle changes or engine dies this is where the problem is. Don't spray intake ducting. Also check coolant temp sensors and possibly IAC.