PLease help. I have an 01 supercrew 4x4 and whenever the controls are in AC modes, the truck will almost stall at idle. When the compressor kicks in, the rpms drop very low and will stall if left long enough. If engaged at hiway speed it seems to work and blows cold. Thanks for any help.

 

Welcome to the forum

Sorry that no one has replied until now.
It sounds like you may have a bad IAC (Idle Air Control) valve. It opens or closes depending on the load on the engine. Essentially it works like if you put your foot on the throttle a bit when the A/C turns on to compensate for the extra load.
You may be able to clean it but the best repair is probably to replace it.
If you do a search in the forum here you'll find quite a bit of info on it.

 

Thanks for the response Racerguy. Sounds like a good place to start. I'm not real mechanically inclined and have paid some expensive repair bills at what turned out to be not so reputable garages. At least now it will sound like I know what I'm talking about when I take it in. Thanks again.

 

There are a couple of pictures of the location of this valve in my gallery under F150 stuff if you need help locating it.

 

lxman nice album! really helps out someone new at the issue!

 

Thanks Lxman1, those photos were helpful as I also have an 01. Maybe this is something I could check myself.