Hey guys Just a question out of curiosity. Just for fun to see what it sounded like, I took off and blocked the vacuum line to the BOV to see what it noise would come out. But all i got was the standard gush noise through the pod filter. Last few cars i did this with I got the "fully sick VL turbo flutter" . What does this actually mean? If there a leak or issue somewhere? Stupid topic, i know but got me wondering. thanks!!