Positive Crankcase Ventilation: Testing and Inspection

Fig. 47 PCV Hose Location:

1. Check the crankcase ventilation hoses and connections for leaks and clogging.
2. At idle, make sure there is a clicking sound from the PCV valve when you lightly pinch the PCV hose with your fingers or pliers.

If no clicking sound is heard, replace the PCV valve and recheck.