STALLING AND DIRTY THROTTLE BODY
You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkal, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still stalls, replace the IAC.
L1 Master Technician
ASE Mastertech with Adv level Engine performance cert.