Positive Crankcase Ventilation: Testing and Inspection

NOTE: This engine incorporates two Positive Crankcase Ventilation (PCV) valves on the outside / bottom of each intake plenum.

1. Start engine and idle.

PCV Test:

2. Remove hose from PCV valve and check for vacuum. If strong vacuum exists proceed to step #4. If not proceed to step #3.
3. Remove PCV valve and shake to check if it is sticking. If OK proceed to step #4. If not OK, replace valve.

PCV Hose Test:

4. Check all hoses for restrictions. Clean or replace hoses as necessary. Repeat the procedure for the other valve and hose.