F 150 4WD Pickup V8-302 5.0L (1986)
Air Pump: Testing and Inspection
1. Check belt tension, and adjust to specifications.
2. Disconnect air supply hose from bypass control valve.
3. The pump is operating satisfactorily if air flow is felt at the pump outlet and the flow increases as the engine speed is increased.
Do not pry on the pump to adjust belt. The aluminum housing is likely to collapse.
