My IAC (Idle Air Control) was acting up by letting the engine idle at 2K and it got up to 3K in between shifts. I took it off, cleaned it the best I possibly could with carb cleaner and it did nothing. I went to the junkyard and pulled one off of an explorer and still had the same problem. This brought me thinking that it wasn't the problem until I just disconnected the plug off the IAC. As soon as I disconnect it, its drops down the a perfect 700 rpm and does perfect. I plug it back in, hit the throttle once, and she stands at 2K again. So I have been driving with it disconnected with the downfall of having to keep it running when its cold by pushing the gas pedal a little bit. Does anyone ever deal with the same problems? It acts up when its warm, cold, all the time.

 

been having same issue got one from advance lasted a month started causing a moaning sound put the clean factory back on stop the moaning but idles high during driving like 1500 rpm I need to just buy a new motorcraft one ps junk yard you never know its a big problem with fords could been bad too

 

I replaced the IAC on my ranger and explorer with replacements from Napa and never had a problem. Cleaning was a short term solution that ended up making them worse.

 

it might not be the aic at all, the ohv motors had a problem with the upper intake gasket which caused a similar problem.

 

The intake manifold gaskets had issues, but when I had bad intake gaskets it never messed with the idle like that.

 

Why wouldn't you buy a new one by now?...

 

well mine wouldnt do that specifically but it would be kinda like that tho.