Should a PCV valve suck air?
Should a PCV valve suck air?
The PCV valve is supposed to suck air in at idle (vacuum). That’s why it’s there. This makes it suck gasses out of your valve cover (and crank case).
How to know if your PCV valve is stuck?
And, you should notice a momentary idle speed drop, of about 40 to 80 rpm. 4- If you notice a bigger rpm drop and the engine idle smooths out; your (PCV) valve might be stuck open. 5- If you don’t feel vacuum at your fingertip; check the valve and hoses for gunk obstructing air flow.
Why are all PCV valves made the same way?
Almost all PCV valves are made in the same way, two hosing connectors with a spring-loaded one-way valve inside of it. When the engine is at idle, you have a lot vacuum inside of the intake manifold, which helps the emissions to get sucked out from the crankcase efficiently at lower speeds.
Why is my PCV sucking oil into the intake?
Probably due to the oil galley filling up with oil, but the seperator was not able to keep the oil out of the intake. I swaped to a larger 351 lightning PCV & that made things worse….cause it was able to suck MORE air/oil than the 302 valve.
Can a bad PCV valve cause rough acceleration?
When you have a faulty PCV valve, causing a wrong fuel mixture, you can feel that your car has rough acceleration on high and low RPMs. On most cars, you won’t feel a broken PCV valve on higher RPMs than idle, but it’s worth mentioning because it can happen depending on the valve’s design.
And, you should notice a momentary idle speed drop, of about 40 to 80 rpm. 4- If you notice a bigger rpm drop and the engine idle smooths out; your (PCV) valve might be stuck open. 5- If you don’t feel vacuum at your fingertip; check the valve and hoses for gunk obstructing air flow.
Probably due to the oil galley filling up with oil, but the seperator was not able to keep the oil out of the intake. I swaped to a larger 351 lightning PCV & that made things worse….cause it was able to suck MORE air/oil than the 302 valve.
When you have a faulty PCV valve, causing a wrong fuel mixture, you can feel that your car has rough acceleration on high and low RPMs. On most cars, you won’t feel a broken PCV valve on higher RPMs than idle, but it’s worth mentioning because it can happen depending on the valve’s design.
How does the PCV valve system actually work?
Knowing how the PCV valve actually works, is the first step in diagnosing a bad or failing one. When your engine is running, thousands of powerful explosions take place to release the fuel energy; producing highly toxic and harmful gases. As a result, in 1961, the PCV valve system was introduced, to deal with this problem.
