The ECU may be keeping the IAC valve open if you're moving for smog purposes
No offense, but I would like a bit more of a concrete answer on this one
I could see idling at 1000 or so, but whether the clutch is in or out (neutral) the car idles at around 1500 rpm until you come to a complete stop. This morning in the cold when I started it up, the car jumped up to 3000! Seems way high even for a cold start.
Would a scan tool be able to check if the ECU thinks the A/C circuit is on when it is in fact off?