MPV 4WD V6-3.0L SOHC (1990)
Positive Crankcase Ventilation Valve: Description and Operation
Positive Crankcase Ventilation System (PCV)
The PCV valve is operated by intake manifold vacuum. When the engine is running at idle, the PCV valve is slightly opened and a small amount of
blow-by gas is drawn into the combustion chamber. At higher speeds, the PCV valve is further opened and a larger amount of blow-by gas is drawn into
the combustion chamber.