Small block Chevy with Qjet.

MPCV valve is buzzing. The sound is like a radio controlled airplane engine (but quieter). I am sure it is the PCV, I pulled it out with the carb vac hose attached and the engine running, and could see the pellet "bouncing" off the the top from vacuum.

Is it simply bad, or do I need to use the back PCV port on the Qjet (On one of my previous posts this was mentioned).

Glad I bought the mechanics stehescope, it led me right to the PCV.