IAC maybe?
My Duratech w/ATX sometimes will drop down to 500 rpms when she's warm. From what I hear most idle probs are IAC related but that didn't solve mine. I'm going to change my PCV valve and see if that helps (I saw some oil spray on my air filter so I know its bad). I'll try to find this thread again and let you know. Good luck!
Oh...and if your air filter is clogged that might do it too.

Last edited by mystery98; 03/01/04 11:09 PM.
98 Mystique LS DOB 06/97