car runs and drives perfectly.
but when, and only when I turn the a/c on, or turn on a climate control function that requires a/c, the idle goes through the roof to 2,000 rpms and stays there like a cruise control.
sometimes in the morning if its not terribly hot out the problem doesnt happen. The a/c is properly charged and blows cold. I have replaced the idle control valve, and to rule out a possible vacuum leak I drove the car with the IAC removed and the IAC intake holes plugged. The problem didnt happen then. I have studied my ford service manuals searched the internet, asked friends, and got nowhere. Seems like a rare problem. I also scanned the obd and have not found any codes nor has the check engine light ever came on.
have the same problem?
Saturday, July 24th, 2010 AT 4:27 PM