So I took my dump valve off today to try and figure out if it's busted. It's been making that hooting noise, but not all the time so it's been bugging the hell out of me. I blew into both ends and it held the pressure just fine. So I'm wondering what's making this god awful when I'm at zero pressure. It's only when the turbo gauge is on the border of white and the yellow/green/I'm colorblind. If I boost or lift it goes away and it doesn't happen all the time. I've been looking at other people's aftermarket valves and they all have the vaccum line on the top, but the bosch unit seems like it's turned on its side. Is that normal, or did some one put my valve on the wrong way?