My friend and i just put a bov in hes 09 wrx, we did it right as the manual said and everything.... and his car stalls in neutral? idk maybe its his driving....
and i think i solved it, i think its leaking because it doesnt have enough washers in it, it has one to make it really responsive but we had 3 and had no problems haha
usually the ebay BOV tend to leak i would know i had a knock off SSQV in my car when i didnt have much money and it leaked all the time barely held boost