Air Diverter Valve: Testing and Inspection

Air Control Valve With Switch-Relief:

1. Disconnect the air supply hose at the inlet and verify the presence of airflow with the engine at 1500 rpm (to verify that airflow is being supplied to the valve inlet). Reconnect the air supply hose to the valve inlet.
2. Disconnect the air supply hose at outlets A and B.
3. Remove the vacuum line at the vacuum nipple.
4. With engine at 1500 rpm, airflow should be heard and felt at outlet B with little or no airflow at outlet A.
5. Accelerate the engine to 1500 rpm, connect a direct vacuum line to the air control valve vacuum nipple from any manifold vacuum source. Airflow should be heard and felt at outlet A with little or no airflow at outlet B.
6. Restore all connections. If conditions above are not met, replace the air control valve.