ive posted this before but im still haveing the problem and cant figure it out. my car when its cold will either stall or drop to about 300 rpm when at a stop or at low speeds like when coming to a stop. its an automatic and i have cleaned both the throttle body and the IAC there are no hose leaks and the air filter is a K&N ad is clean. i know the IAC is running because i can hear it humming with the key on. It has a new Catalytic converter and sensors. if anyone can give me any help i would appreciate it because i can think of anything else.thanks.