The more I read about vaccum leaks and so forth I came across a thread stating that if you ran a breather in each valve cover you could plug the pcv valve. What I have may be creating my idle problem or maybe not, I thought I'd atleast ask. I have a set of Trick Flow valve covers and the drivers side has a breather hole cut out so I put ina breather. The passengers side has two holes in it, a hole near where the throttle bracket is for another breather so I just put a low profile chrome cap and the second near the front that I used for the oil fill tube. So basicly I have 3 holes in my valve covers one with a breather one with a oil fill plug and one with a oil fill tube and plus I'm runnin the original pcv setup from the upper intake to the hole in the rear of the lower manifold with a screen. What do I need to do, plug the 3 holes, plug 2 and leave one for oil fill tube, or plug the pcv at the upper intake???