nah parrot, the fresh air comes from the air filter housing, the PCV doesnt feed into there, if thats how its setup on urs its been setup wrong.
That little meshed filter is supposed to be stoppign solids from entering the PCV breather hose, which should be on the other side of that. Thats why its inside the filter, so that the fresh air supply is filtered.
The pcv valve wont open from the "at rest" backfiring position unless it has vacuum pulling on it.
To get the catch can to work, you must pull the PCV gasses into it, by sucking through the catch can with vacuum.
If you don't have a vacuum source involved in your catchcan setup, you are completely wasting your time and risking having nastys building up in the crankcase, , and greatly increasing oil consumption.
If you want to run a catch can setup it has to be like this
Sorry bout the poor graphics haha MS paint can only do so much