2004 S4 PCV NC or NO?

[calebtbay]

2004 S4 B6 4.2L

Should the PCV valve be closed and then open at 2-6psi?
If so then that means mine, that after being removed, is all the way open, its bad?

Being a passive component I don’t really see any way for pressure to change it state when it’s just all the way open like this.

It doesn’t rattle. Should it rattle?

Could this be why I’m burning loads of oil?




Sent from my iPhone using Tapatalk

[calebtbay]

I figured it out. In my mind there was atmospheric pressure in there which isn’t the case. Its either positive or negative always. Duh.
So the vacuum is sucking the valve shut and positive pressure allows it to open. I took it apart and the diaphragm is perfect. Its working just like it should. Not why I am burning oil.
After removing it, cleaning it, tightening all the hoses, cleaning the MAF, my lean code hasn’t come back. Its only lean on one bank, not both so I guess it could be an O2 sensor.