[Vepper]

Hi, this is my first post here, my 335xi has been randomly losing power while driving, and will stall sometimes while stopped. I have already taken it to a shop to diagnose the issue and they couldn't figure it out. The only codes that are showing is for an automatic transmission sensor (the car is manual), and all sensors are showing normal values. The ship looked at valves and thought maybe they needed cleaned, but it didn't work. They also refreshed the ecu with the stock tune.

[OMEGA412]

Could be a myriad of issues, if you could get a video itd be easier to diagnosis. Id assume what your feeling is a misfire

[acidbbg]

You should Get some data logs to help narrow the issue. I recommend MHD or JB4 as both have that capability, not to mention the bonus of the extra power it adds to the motor.