Hello i just got my gn back from the shop and this is what they did. K&N air filter, new fuel pump, adjustable fuel pressure regulator,adjustable wastegate, and a jay carter 93 octane chip. Now when i get to 15 psi it is fine. But when i get 15+ psi i just hear this hssssssssssss and i loose all boost pressure it goes back down to zero. I put a reds 93 chip in and it did the same thing. Could someone tell me what this might be?