Positive Crankcase Ventilation: Testing and Inspection

POSITIVE CRANKCASE VENTILATION SYSTEM CHECK






1 Remove the positive crankcase ventilation (PCV) valve from the rocker cover then reconnect the PCV valve to the vacuum supply hose.
2 With the engine idling put your finger on the open end of the PCV valve and check for negative pressure (vacuum).

NOTE: At this time, the plunger in the PCV valve should move back and forth as the open end is covered and uncovered.

3 If negative pressure is not felt clean or replace the PCV valve. Inspect the vacuum supply hose and vacuum supply hose port for restriction or plugged condition.