Air Supply Pump
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford Econoline, 1995 Ford Club Wagon, and 1995 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
Check belt tension, and adjust to proper tension if necessary. Disconnect air supply hose from by-pass control valve. Start engine. Pump is operating satisfactorily if airflow is felt at pump outlet and airflow increases as engine speed is increased. If pump does not operate as specified, check for plugged air silencer/filter (if equipped) inlet. Clean as necessary and recheck pump operation. If vehicle is not equipped with an air silencer/filter, replace pump.