Q: What is the Positive Crankcase Ventilation (PCV) System and PCV Valve?
A: The Positive Crankcase Ventilation (PCV) system reduces hydrocarbon emissions. It consists of the PCV valve, an inlet hose connecting the air filter housing to the valve cover, and a crankcase ventilation hose connecting the rear valve cover to the intake manifold and the PCV valve restricts flow when the intake manifold vacuum is high.