Air Control Valve

Testing Air Control Valve:

1. Warm up the engine to normal operating temperature.
2. Connect a tachometer to the engine.
3. Disconnect the air hose (air silencer to air control valve) at the air control valve.
4. Place a finger over the air control valve outlet.
5. Increase the engine speed and check that air begins to flow out from 1,500 to 2,500 rpm.
6. Run the engine at idle speed.

Solenoid Relief Valve:

7. Disconnect the vacuum hose (Solenoid valve (Relief) to air control valve) at the relief solenoid valve.
8. Check that air flows out.
9. Reconnect the vacuum hose and the air hose.

Split Air Hose Check:

10. Disconnect the split air hose (check valve to intake manifold) at the intake manifold.
11. Place a finger over the port opening.

Solenoid Switching Valve:

12. Disconnect the vacuum hose (Solenoid valve (Switch) to air control valve) at the switching solenoid valve.
13. Check that air flows out.
14. Reconnect the vacuum hose and split air hose.
15. Replace the air control valve, if necessary.