+1 for going back to stock and start with intake. I have gotten the mass air flow too high error before when the clamp on the intake wasnt completely secured to the filter but I dont know about that one. maybe try to put the box on cause that is its design.
__________________
2014 335i M-Sport, CTS intake, VRSF FMIC, VRSF CP, BM3 stage 1
|