Forgot to mention, if you do reset idle speed, the part of Plumcrazy's procedure involving the engine computer and the screw at the TB, you need to recheck the TPS. Turning the screw changes the throttle blade position. The idle speed resetting may not be necessary, though you still need to check IAC motor pintle distance. You may try idle resetting if the car still idles poorly.
good luck.
good luck.