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I went under there and listened, I can hear a hissing that almost sounds like a vacuum leak. But I am not sure where exactly, The bov works i can feel it release pressure when I rev the engine up, but I am not sure exactly where the hissing sound is coming from. This is just one big pain, because from what I can hear I have compressor surge, which means all the pressure isn't coming out of the piping, which leads to the bov, I am not sure if it is because it isn't getting a good enough vacuum to open all the way or what. My boost gauge works correctly and it just kinda sits at -20 when the car gets down to about 1k and starts dying because it won't idle the gauge goes to about -10 then to 0 when there is no vacuum. This is my first Nissan I've ever owned, Ive only had hondas before, so far I love it. It's just this damn problem that is killing me, because on the way home driving it when I picked up the car it was running fine boost was at the full 15psi it was suppose to be, now I'm lucky if it'll sit at 12psi and when I switch gears it won't even go up back to that maybe 10psi. So I have no idea what to really look for, I've checked MAF, IACV, TPS, checked for exhaust leaks around the turbo manifold, fixed one and that helped, checked all the piping as well for leaks and nothing. I have felt around the BOV when at idle and didn't feel any vacuum leaks so it's just a huge hassle right now.
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