N14 Redtop Cummins Skip

Hello All,
We have been trying to remedy this problem for a year now. We need some creative help. Between running the truck and repairing what we thought might take care of it, taking it to a few shops along the way, and trying our best to figure it out, we are still skipping intermittently. Sometimes the truck runs great...like it should...sometimes the truck will skip under a load. The best way to get the skip to stop is to come out of it (the throttle), get back into it, come out of it, get back into it, and then it will typically find itself and clear up.
However, if the truck is on a decent sized pull, this will not work. You have to breech the crest of the hill before the in/out technique will help to even it out. Sometimes it is more stubborn than others but typically it will even out and run as smooth as silk for hours at a time. There is no rhyme or reason to it but being under a load seems to provoke the problem. We have no computer codes currently, all injectors are firing as they should, we have replaced all fuel lines, we have addressed the restrictor plate behind the ecm, and yesterday we bypassed the fuel filter housing for about 80 miles to see if that might help the problem. It did not. No idea where to go from here. Any help would be greatly appreciated. The injector harness was checked recently and it checked out fine.
Thanks Very Much for Any Help

 

Ok, Thanks for that. I will definitely see if either of these items help.

 

NO!...does not feel very good!

 

How much atf at one shot?

 

Have not tried swapping the ecm...The last person or shop we took it to is known for being great with electronics. He did not feel like it was the ecm but we will consider suggestions that seem relevant. He also did not feel like it was the injector harness (checked it out thoroughly) but here's the deal. It comes and goes so it's hard to pin down anyway. If you had a bad pass through on your harness, wasn't it showing up as a bad code? That's the thing...we're not getting bad codes.

 

Have not replaced the EPS. Is it possible that it could be intermittent for a year, though?
Thanks for the suggestion.!