Curb Idle

Fuel Injected
Retract ISC plunger by hand and disconnect ISC connector. Set minimum speed to specified value. Check TPS voltage for recommended setting. 6.0L (368) only: disconnect TPS connector and open throttle by hand to approximately 1500 rpm. Close throttle and turn ignition off. ISC plunger should extend fully. Disconnect ISC and start engine. Set maximum speed to specified value.