COMPONENT TESTING

1. Disconnect the ventilation hose from the PCV valve. Remove the PCV valve from the engine. Once removed, reconnect the ventilation hose to the valve.
2. Start the engine and allow to idle. Place a finger over open end of the PCV valve. Make sure intake manifold vacuum is felt on finger.
3. If vacuum is not felt, the PCV valve may be restricted.

   Fig. 1: With the engine idling, check the end of the PCV valve to see if vacuum is present

4. Turn the engine OFF and remove the PCV valve from the hose.
5. Insert a thin stick into the threaded end of the PCV valve. Push on the inner plunger and inspect for movement.

   Fig. 2: Inspect the PCV valve for inner plunger movement. If the plunger is bound or sticking, replace the valve

6. If plunger inside the PCV valve is not free to move back and forth, the valve is clogged and will require replacement.

   NOTE: It is possible to clean the valve using the appropriate solvent, but replacement is recommended.