-continued from previous post-

Injection pump timing
Now if he just had the pump removed and rebuilt then the timing chain for the pump should still be intact and in the correct position.
On the flange around the injection pump there should be marks/lines indicating a setpoint and the mounting holes will be slightly slotted to allow for a slight rotation of the pump assy.
(This is just for the external timing adjust) If the tech that had the pump out did it right he should have made indications where it was set so when remounting it the pump would be in the same spot. You can loosen the mounting nuts and attempt to move the pump in small increments and attempt to see if that clears up the timing problem.
If this does not improve anything then you will need to get a trained caterpillar diesel tech for this engine to come and check the fuel injection pump internal timing. It is a complicated process that requires special tools and i cannot go into explanation here.

So do all the things here (and the previous post) i explained that you can and see if you get any positive results.

Hopefully this helps :o)