I had a bung welded on to the intake before the turbo. The kit really should have come this way. You don't want to plug it.

Can u show me a pic?

why not just vent it to atmosphere

I did added a filter

Car is being worked on at the moment, so I can't snap a pic until tomorrow, but in regard to venting to atmosphere, when I spoke to Crawford about this they indicated you'd lose power and it's generally not something desirable to do.

Yep they told me the same thing but i then why do D3 performance and many other has them to blow to the atmosphere

Quite honestly I don't know enough about it to answer intelligibly and defer to others that have a better understanding. From what Crawford explained, you want the crankcase to be under vacuum and you don't want oil leaking onto the road. As far as D3 goes, no idea.

They don't have any diagrams of the inside of the can so it's difficult to tell for sure how you need to connect it with a boosted application.. but i am guessing, since any oil caught is supposed to drain out the bottom port, the can has no internal separation and as a result it's not doing anything good in the current configuration.

Fairly sure the way that is plumbed right now you are sucking unmetered air into the intake manifold when off boost and blowing metered air our the when under boost. That may be part of the reason your fuel trims are all over the place.

For the time being, you should take the can out of the equation and put the system back like it was before you installed the can.

For that can to work properly it needs to be a closed system. You will need a bung pre turbo (as others have said) to connect to the port that is open. you also want a good check valve between the can and the intake manifold port so it will not pressurize the can under boost pressure. The stock pcv valve is on the block side so as soon as you go in boost the charge is filling the can and running out the open port and back into the block on the connected intake side port.

I honestly think you would be better off with 2 separate 2 port cans and a couple of crankvents (http://www.et-performance.com/automotive.html)... the idea draining the caught nasty back into the oil system is.. well... nasty.

Will take it off tonight and will go with d3 performance one

They have also blown motors and had their car performing poorly in two videos now, so I don't know that I would take my advice from them. Venting to atmosphere definitely won't hurt your car. If you plug that extra port then the vacuum from the back of the intake manifold should still pull on both the PCV and the front port.

Until someone shows me gains when pulling vacuum on the crankcase, then I will stick with vented. I don't want that oily air going through my engine.

So having a filter is ok?

Fair enough--last I heard, they were up to 4.

4 engines??? Holy shit