As it does nothing, it blocks it off and im left with compressor surge. Any body else had this problem? Im convinced i dont get good vac, my boost gauge doesn't suck right down in over run, its 1-2 notches from total vac. my stock valve is fine but then thats light as a feather to open. Even under full boost this valve wont open?? Works fine if i suck on the nipple and stick my finger in the flange to push the secondary piston open
