I got in my car this morning and right when the boost kicked in it started going up and down very quickly like was totally unsteady going from like 7 to 10. It was like flickering. I got scared a parked it for the day. I have a Joe P. boost controller and I have never had a problem like this before. The night before it ran perfect. I think maybe it might be a vaccum line going to the y-pipe it didnt have its clamp on it for some reason. Think maybe some air is gettin out or something causing this. Any ideas would be appreciated.