Originally Posted by Dj Michaels
I went back and read you post again and saw where you said where the ground problem was. My fault. I have a family member who works for cummins and I will show him you post and have him check that out. By chance when you experienced you problem did it seem that you engine was missing or what I felt was a hard miss as if it had bad fuel and wasn't going to continue running.
I did not get a pulse or surging engine when driving with out the cruse control engaged.However with it engaged the engine would surge. The fix the that was to clean the contacts on the cable and connector at The ECM.
This problem was never related to the Alternator issues.
They showed up in the speedometer with the needle jumping all over,and a few time with the speedometer reading over 100mph.
That was a bad ground connection between the alternator and the alternator ground cable. The engine mounts keep the engine isolated from the frame so the ground is required..