well im not posting any codes and i know my bbv is working i will attempt to look for leaks but i doubt that is an issue because i recently replaced the supercharger gasket, when i put this motor in the car, i know the m90 was in good shape as i installed the nicest m90 i have and it looked almost new (walls and rotors). this motor also pulled much harder than the last one i had and after the basic 1.5 dhp generic tune its awsome. makes my l67 fiero swap seem a bit weak considering im pushing a fat 4door fwd car compared to 1000lbs lighter rwd.