The BOV is a Apex'i Twin Chamber. My question is: We installed the BOV and hooked up the vacuum source to the throttle body, between the tb and map sensor, and also at the fpr. But when we run it it does not sound like it is blwoing off. This kit was on a different car previously and made a distinguishable sound. Thanks for any and all help.

 

might sound a little stupid but are you making any boost? if so how much? its probably pretty quiet at real low boost levels