so my car does build boost but doesnt move like it use to but also my car was boosting 12psi and now its at 9pis i dint do anything just from one day to another does anyone know or have a clue wut it could be??? maybe spark plugs i just rebuilt the motor not to long ago it only has 1500 miles on the motor.. /ubbthreads/images/graemlins/dunno.gif