The PCV valve is a vital part to the vehicle as it takes out gases from the crankcase and sends it to the combustion cylinders. When the gases have been sent to the combustion chamber, it will be ignited and this will enhance the engine efficiency as well as lessen toxic emissions.
PCV Valve functionThe PCV works by controlling the flow of the gases that go into the intake system. When the vehicle is in idle, it tends to draw in a large amount of crankcase gases and the engine performance decreases. And the PCV valve closes when the manifold vacuum under stress, restricting the amount of gas flowing into the intake.
The PCV can also acts as a flamer arrester in order to prevent pressure from entering the crankcase. This kind of positive pressure can occur with turbochargers or if a backfire happens, therefore the PVC valve has the job of closing to avoid the pressure getting to the crankcase.
Common issues with a faulty PCV valveA bad PCV valve can cause oil leaks, poor fuel economy, and the vehicle may have some misfires.