Originally Posted by BMWN54tech
You have 1 or more fuel injectors that are stuck open. 100% positive. I see this in the shop daily. If you have been driving like this for a while you have also destroyed your catalytic converters (both) on that bank. The raw fuel is dumping into the cat and melts them. They clog the secondary cat. This can also get back into the motor and cause serious damage to your vacuum pump, which would be that squealing noise. Driving your car in this condition causes major major damage.
The N63 uses the same fuel injectors and when they do this it occasionally hydro locks the motor and bends the connecting rods.
This happened to me.
Once I replaced all 3 injectors in my Bank 2, all the misfires went away. When FFTEC replaced my clutch, and removed my DP's the noticed all the catalysts destroyed. Luckily stock DP's can be had for pretty cheap.
2007 E92 6MT SGM: MusicarNW Level 2, Procede Rev 2.5, FFTEC/Vishnu LPFP with Flexfuel Sensor and Flash, M3 Offset V701's, WaveTrac LSD, Michelin PSS, Downpipes, M3 Control Arms, TCKline D/A Suspension, LCI Tail lights, Lux AE's, ER Charge Pipe, DCI's, Mtech Front and Rear, M3 Sideskirts, HPF Stage 1 Clutch