Check your pressure with a mechanical gauge.

A BB chev, just rebuilt in a pickup, was over at a mechanics house.. It had a horrible squeal that no one could diagnose.. Mechanic was just getting ready to pull the pan thinking the engine bearings were going out or were installed wrong.. Yes, it was making a horrible sound... I listened to it, and looked at it, then reached in and took out the oil "plug" in the valve cover.. No more squeal..

The pcv was pulling vacuum and the "plug" on the other valve cover was not letting in any air.. The whole engine was under vacuum and everywhere the engine could leak air it was.

God I felt good that day... A hero....