Originally Posted by NorCal2500HD
Normal, but can be embarassing at times. Its unburnt fuel that collects in the DPF. Not soot ash...
Mine was a whole lot worse than that. It would blow enough smoke to give a coal roller envy! Worse part was my commute home wasn't long enough to complete the regen cycle and if I didn't pay attention and shut down, It would start all back up again and do the same thing the next day