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pcv system

I've just been having a look at my pcv hoses and I took off the crossover hose with engine running and nothing happened. Isn't the engine supposed increase rpm if you take those hoses off? Could that mean there isn't vacuum? It did increase revs on my Subaru when I did that. There is also a lot of oil in my intake before the throttle body. I wasn't able to get the pcv valve out will try again later. I assume I should just get a new valve and grommet.

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https://www.sau.com.au/forums/topic/468875-pcv-system/
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