B7 Supercharger system unsolved issues

[bigmichy]

It sounds similar to an issue I had with my 07 B7 a few years ago. If I was acceleratoring on the gas or de accelerating completely off the pedal she ran like a champ but if I tried to feather the gas and stay at a certain speed between 80 and 120 she would buck like crazy. As if fighting for. Fuel.

After three months and back and forth between BMW and Alpina getting nowhere a super mechanic snuck a camera down its throat and discovered that the secondary throttle gears were made of plastic and were worn as to not allow them to work properly. Replacing the plastic gears solver our problem.

Hope this helps