Oil Catch Can

[06YarisRS]

Originally Posted by matthewai

I see I see, so I've also seen those ones that screw on in place of the oil fill cap and they have a one way check valve ball, now I was understanding that you only want the air to be able to escape the crankcase not be sucked in through the vent. and I guess my original thought was since im running the oil catch can it adds more lines, seals, and connections where gasses could potentially escape, so im just trying to figure out if I should add the crankcase vent so any vapor would exit through that instead of some other part failing. even though im confident with the install and have seen no leaks

photo is not of my engine bay

Yeah, at one point I thought I had it all figured out, but it's been a while, so I forget the reasons. I can't remember all the logic I used to determine that I needed one. However, as mentioned in the link provided, when I plugged the vent hose, vacuum increased to the point where the engine was going to stall. I toyed with re-routing the exit of my oil catch can back into my pre-throttle body charge pipe. In my research, I found many varying opinions, some suggesting that I should completely cap off/eliminate the PCV system. I am now running well, with reasonable fuel trims, so I don't plan on messing with my current configuration.

Do you have any additional info and pics of your setup?