other features at the air throttle body assembly include: 1. A preset stop ta locate the WOT position. 2. A throttle body mounted throttle position sensor. 3. Canister purge port(s) (two on 5.0L. one on 5.8L) tor evaporative emission control. All THROTYLE mv 16594va For"; pure ssr sanw AIR smss VALVE IDLE SPEED comnm mam-n6 POSITION I sENsun 3:33;? PORTS [5 an vwssu