my 96 explorer has been howling like a wound dog, especially when it's hot. Couple of threads mentioned replacing the IAC, idle air control valve. $37 later,R&R the piece in about 2 minutes, and haven't heard this car this quiet since it was new. thanks for the input guys.

 

Here's a sound/video clip of the condition... Thanks for the repair update...

http://homepage.mac.com/dogfriend/Ex...Theater14.html