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Oil catch can

If the can (hence the line) is clogged it will definitely increase crankcase pressure, as it is a closed system and the pressure has nowhere to go except eventually out the seals. The intake side doesn't matter on a N/A if its sealed or not, its actually better if it is sealed like old style engines that also vented crankcase pressure directly to atmosphere. The intake side on N/A is always a vacuum when running. Actually considering a new can with a vent to atmosphere to avoid this situation. Fundamentally I had the same situation as a stuck closed PCV valve. Its not good, hence the idle issues.
That's not how the PCV system works. I suggest you do a little more research on it. By "intake" I mean the air intake from air box to throttle body. There should be zero vacuum on that.
 
Ive done all the research I need to do. I know how it works, and it works exactly how I explained it, hence my success in fixing said system and fixing my idle issues. If you have more to add about how it functions, please share what you know.
 
Easiest thing I've ever installed.
My main concern with that catch can is the small capacity. It only holds 3 oz of liquid. I hope you’re planning on checking/emptying it often, especially in winter months.
 
Ive done all the research I need to do. I know how it works, and it works exactly how I explained it, hence my success in fixing said system and fixing my idle issues. If you have more to add about how it functions, please share what you know.
The PCV valve is connected to the intake manifold and has the vacuum on it. The other hose that connects to the intake tube(between air filter and throttle body, is fresh air inlet into the crankcase. There is no valve on that line. pCV is not "sealed". That tube not on the PCV valve side will vent to air is there is pressure in crankcase
 

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