Caravan FWD V6-201 3.3L (1992)
Positive Crankcase Ventilation Valve: Testing and Inspection
Warning: Apply parking brake and/or block wheels before performing any test or adjustment with the engine operating.
1.
With the engine idling, remove the PCV valve from its attaching point. if the valve is operating properly, a hissing noise will be heard and a strong
vacuum felt when placing a finger over the valve inlet.
2.
With the engine off, the shake the valve. The valve should rattle when shaken.
3.
Replace the valve if it does not operate properly. Do not attempt to clean the PCV valve.