Hey guys. I know this isnt the right subforum but its the same engine(N54) and the E60 forum is pretty dead. My dad has a 2010 E60 535xi with the MHD Stage 1 tune on it. Its been having some fuel pressure problems lately. In the past few weeks, the car will completely shut off on him while driving around town. He's able to start right back up again and drive away like nothing was wrong. I had him pull the codes and he had the following.


Active:
29DC- DME; Cylinder Injection Cutout
29F2- DME; Fuel High pressure System, Fuel pressure


Shadow:
2AAE- DMW; Fuel Pump
2FCA- Fuel High Pressure ( followed by a bunch of german)
2FDA- Fuel High Pressure ( followed by a bunch of german)

2FDB- Fuel High Pressure ( followed by a bunch of german)

I had him do a 3rd gear pull (he did it in 2nd by accident) and heres the data he sent me
https://datazap.me/u/ryansbmw/2010-5...g=0&data=11-20

Im going to have him do a few more pulls in 3rd gear and make sure the results are consistent but does anyone have a clue as to what the problem may be? The codes point to HPFP but the data shows the pressure to be fine. Im looking at the the LPFP and the lull it goes thru between 3800 and 6000rpm but im not sure how its supposed to act.