[CaseyT]

Has had a new IAC put on it twice since January. It has a new TPS, just installed last week. No vacuum leaks that I can find. I cleaned throttle body and I re-coated the throttle body walls because I heard the cleaner was bad for them. It has a new MAF that was put on in February. The problem was there before all of this was done. It started about a month ago...... Cold start, it will take 3 or 4 cranks to get it to stay running, then when I come to a stop light it will want to hang idle at 2,000 RPMs. Sometimes 2,500. I haven't messed with the idle screw. I'm out of options. Has anyone had this problem and fixed it? Does anyone know what it could be?

 

[TOM RENZO]

Non metered air is getting in to the engine. Smoke test it. Also show a photo of the IAC unit. Some of the older ones had issues. I need a photo to see which one you have. Peace tom:yelpleased::yelpleased::yelpleased:

 

[CaseyT]

i will be posting one up later today. its the Duralast brand from Autozone. Would motorcraft be better since it is a ford part?