just installed my bov, took it for a run the first time it blew off at 12psi and wouldnt let boost go above that, then i tighten it and hit 18 psi and evreything was fine but when i let off the gas the was no sign of the bov doing its job, i still heard compressor slamming, i have the line hooked uped to the fourth line on the vaccum block along with my boost gauge, anyhelp would be great, by the way its a greddy unit. thank you