i don't know if anyone has any clue about the grand prix brake booster but here goes. i took the master cylinder and booster out of teh car to make engine removal easier and i think i might have reinstalled it wrong. i put it in and now it "feels" like i have no power brakes. also driving the car you can hear inside what sounds like a vacuum leak. i think maybe when i twisted the booster on or put the shaft through i messed something up. any thoughts anyone???