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Does PCV valve affect RPM?
Because the PCV valve controls the airflow between the crankcase and the intake manifold, a broken PCV valve can have the same symptoms as an intake air leak, which can cause the idle RPM to get too high and other strange idle behaviors like very rough idle.
Is there a difference in PCV valves?
It isn’t uncommon to see 50 or more PCV valves on the shelf of any auto parts store. Each one has unique flow characteristics and vacuum transition points, and is designed to work with the vacuum and blowby requirements of a certain group of engines.
Are PCV valves universal?
No they are not universal, but you can probably get by using a different one. BTW I just pulled the 90 degree elbow off one valve to use on the PCV valve for my engine. There is an orifice inside the valve, these vary in diameter, and the springs have different tension from one another.
Do I need a PCV valve on my SBC?
You need the pcv and a breather. They should be on opposite sides to create an air flow through the engine to get the bad stuff out. Without a pcv you run the risk of blowing out seals or actually having an explosion in the crankcase. The engine will also sludge up inside quickly.
What is a Type 4 PCV?
The purpose of the closed breather cap is to direct these extra gases to the air supply where they too can be burned in the combustion chamber. This allows the Type 4 or “closed” PCV system to ventilate the blowby gases from the crankcase and feed them back to the engine under all conditions.
Does all cars have PCV valve?
All cars that have internal combustion engines have Positive Crankcase Ventilation (PCV) valves. On your car, the PCV valve is at the top of the engine in the valve cover. You will see a rubber ventilation hose attached to the PCV valve with the other end of the hose attached to a stub on the air intake system.
What happens if you put the wrong PCV valve in your car?
As the PCV valve starts going bad, the performance of your vehicle will get worse. This can be exhibited by a buildup of pressure in the exhaust or the engine could stall out. When this happens, the fuel and air mixture is diluted causing your vehicle to run poorly and lean out.