93 Octane

Rev 4 dyno pull 4th gear surge.

Rev 3 dyno pull 2 in 4th gear with some surge.

Rev 3 4th gear dyno pull surge.

Rev 2 tune 4th gear dyno pull with surge

Dyno pull 4th gear stock tune.

Stock tune 4th gear dyno pull.

2009 335xi with front wheel drive OFF via xDelete. 60* F ambient. MHD Stage 1+ tune with CSK Performance FMIC. Turbos replaced with OEM at 50K and the car is now at 138K miles. All recently new NGK 5992 plugs (at 0.022"), pre-cat O2 sensors, vacuum lines, upper and lower aluminum charge pipes, HPFP, low pressure fuel sensor, intake valve cleaning and external PCV valve mod with catch can.

Engine started misfiring it seemed, then engine killed. **(Figured out it was a faulty crankshaft position sensor! Fixed.)**

I noticed FFS pulls were running zero WGDC after first gear, I disabled FFS and did a few pulls while driving around and definitely saw 25%+ WGDC and a return to 20psi vs 17.5 on wastegate spring.