A few days ago I started hearing a flutter sound from what I believe is my BPV, my car was modded a little over a few weeks ago with the following:
-AMS Mitsubishi Lancer Ralliart Performance Intake with bungs
-Cobb XLE BPV
-AEM Boost Gauge
-CPE turbo-back exhaust system with resonated test pipe
-AMS Mitsubishi Lancer Ralliart Intercooler and Upper pipe Combo
-Cobb AccessPort Engine Management System - Lancer Ralliart 2009+
-AMS Mitsubishi Lancer Evolution X / Ralliart Boost Pill
-AMS 2009 Lancer Ralliart Mini Battery Kit
-Dyno Tune
: The boost gauge is reading completely fine which leads me to believe it is not a compressor surge, any thoughts? I really wanna get it fixed as the fluttering noise bothers me and I'm not sure if it's doing harm to my engine/turbo
-Pictures of the build below-

 

What sort of bov do you have and if it's plumb back can you adjust the spring tension? \

If so take note of it's current position but set it all the way to tight and see if the flutter is gone. It may make the map go crazy this way so continue to loosen until you no longer have flutter but dont have a sharp jerk from the maf sensing when the bov is activated.

Hopefully that helps.