OK, I did some playing around with the car, and I'm 99% certain it's not a vacuum leak. I have narrowed it down to the IAC
valve. I unplugged the valve before starting the car, and it didn't idle high at all; instead it idled around 400-500 rpm
very roughly. When I plugged it back in while it was running, it jumped right up to 1600 rpm
This would lead me to believe that either something is wrong with the IAC
, or something is causing the IAC
to idle the car high when its cold. If it's not a problem, could someone tell me what sensors or other miscellaneous things affect/control the IAC
? I know that the coolant temp sender was mentioned before, but I have eliminated that as a possibility. As I said before, the IAC
on the car now is a new Ford part, so I'm fairly sure that the IAC
itself is not the problem.
Any help would be appreciated, this thing is driving me nuts. Its gotten to the point where I automatically hit the remote start whenever I approach the car to get in, otherwise I end up sitting for a long time.
Thanks in advance---