Re: URGENT HELP NEEDED
Hissing from turbo would suggest a Hose split, the one that goes under inlet manifold is really soft where it pushes up on turbo, also the turbo to i/c hose may have come loose, any of these will cause a hissing sound and it will run like crap, and naturally boost will escape after turbo,
no boost/ hissing sound would point me towards a pipe or hose that is after turbo and contains boost pressure, like turbo to i/c, i/c to throttle body etc etc