Ok, first post but I have been working this issue for a while. The car is a 2002 GTP 3.8 SC all stock. I have a P0171 fuel trims are bad LT 16.41 ST 10.43 goes to perfect at high rpm. I have smoked it and smoke dumps out the oil fill immediately. Checked the PCV and it is good. I even plugged it off. The leak is elsewhere. Pulled the valve covers and check for leaks at the valve seals and just pulled the intake and supercharger and replaced gaskets. I smoke the crankcase and pulled plugs to verify it is not the rings. Where else could I be getting this massive vacuum leak. I am missing something and could use some insight. Thanks if you made it this far.