Stalling 2000 Taurus
My wife's 2000 Taurus with the standard 3.0 OHV stalls after driving an hour or so. It displays code "P1504, idle speed control auxilliary inputs"
and no other codes. It can be driven fine at any speed other than idle. The problem clears after the engine cools.
I have ordered a new idle air control valve, but have checked the original one and found no obvious defects. Resistance looks good and the valve mechanism is free to move. This makes me think that it might not be bad. Has anyone heard of another problem which might cause this?