[keweizhao]

I just got a massive misfire code: "29D1, Combustion misfires, Cyl 5", and changed to a new coil for cylinder #5 (#1 is at front of the engine V6 of 2008 528i). No problem at beginning but rough in idle after driving 60 miles, and "2E1C, Firing, cylinder 5" appeared. It turned out that the harness to coil connection was loose due to the cracked clamp. Push in the harness fully and replace with a new clamp. Hope that might be the only cause of the misfires, as the car was free from misfires a about two years.

[dradmil]

Originally Posted by Knob

Didn´t log anything yet, since the car runs pretty smooth. Before that I couldn´t barely accelerate without a CEL, that works without problems again. One thing I didn´t mention was, sometimes I got an error like "misfire at low fuel", where the fuel was really low, but I´ve read that is quite common and nothing to worry about..

I have the same problem, tomorrow I will try to change the sensor. Did you have a strange smell of gasoline while driving until you solved the problem? I'm reading about your problem and it's like I wrote, everything is identical, there's nothing I haven't tried and I sincerely hope that it will solve the problem.

[konstat]

Originally Posted by dradmil

I have the same problem, tomorrow I will try to change the sensor. Did you have a strange smell of gasoline while driving until you solved the problem? I'm reading about your problem and it's like I wrote, everything is identical, there's nothing I haven't tried and I sincerely hope that it will solve the problem.

Do you also have a slow crank when starting the car cold? Based on slow crank and fuel smell symptoms, the fuel pressure regulator is leaky and needs to be replaced. Although the low fuel pressure might look good in logs, the leaky regulator doesn't supply full flow to the high pressure pump, which causes a micro fuel starvation issue and thus a misfire.

[dradmil]

I changed it, the problem remained...

[konstat]

Originally Posted by dradmil

I changed it, the problem remained...

Changed the regulator or the coil connector on the wire harness that the OP posted as a solution to his problem?