Did you use premium injectors?
Did you install recon heads?
Was the cam and cam followers inspected at time of overhaul?
Does the miss subside as soon as you back out of it?
Can you describe the miss in detail?

Did you have them run the injectors at cummins before you left with them, last I heard they were rebuilding injectors in Mexico, neighbor picked up a set at Cummins and had them run them, parts guy looked at him like he was a goof, but took them back and had them run, 5 were out of spec, took those five back to run them, 2 were out of spec...but when he left he new he had a set within spec.

The injectors were rebuilt by a local shop and tested after the rebuild. The heads were also checked for leakage and were fine. When it hesitates it is like a cough. Real quick like it only drops a cylinder or two then it is back to normal. I dont lift or back off at all. It is similar to a gas engine how they backfire some after a free rev. I think that is the best description. Obviously this is only on acceleration. The cam was checked for flat spots. It is intermittent. It is already over befor i have a chance to lift and the motor just drives right through it. There is a loss of power but the whole event lasts less than a second

I would set the pump to manual and run it awhile and see if that stops it, only thing is then you will have to kill the engine on every shutdown.

Originally Posted by x#1

i recall when things were so simple as in the above.buttons,shims,turning screws,pulling throttle locks(and setting them),NO TPS's. ALL that good and simple stuff.

My thought is the power solenoid, bad wire connector to solenoid, perhaps a chafed cable against a frame rail or crossmember, something electrical, but not being able to walk up and take a look, I could only suggest setting it to manual to test this theory. How do you thpell chafed???

Maybe a fuel line collapsing??Spent hundreds on misdiagnosis over a month,several different shops then found it was a collapsing fuel hose/line.Wouldn`t hurt to replace the supply line.

I too would replace the fuel solenoid and verify the integrity of the wire circuit.