05 Dodge Cummins 3500 need help please I'm losing my mind here

Ok so in Aug of 17 I replaced all of my injectors, then shortly after that I had
my tranny rebuilt then in June of 18 i ended up with substantial blow by. Had
the engine replaced. Picked the truck up in the evening and the next morning
went to drive it about 30 miles and it loses power and goes into some sort of
limp mode. I take it straight to the shop that installed the engine and they tell
me that I have a bad injector so thats another 225 dollar charge for them to
install the injector. i pick the truck up again drive it pulling a trailer to take a
steer to the processor ( about 45 min-1 hr ) one way.... no problems. go the
very next day to the vet with some calves and the same thing happens
extreme loss of power and some sort of limp mode ( it is always Either one
or the other or both #5 & #6 injectors )limp it home from the vet and it evens
out at some point. I then take it to the dealership and they tell me its the
injector wiring so i order those and change them. no change in performance
still dose the limp thing. So i take it to a different dealership 2 weeks later
they tell me that its my injectors . so it has taken me since june to raise the
money to buy the second set of injectors, put those in this week along with
new tubes and a new fuel pump. get it finished last night drive 15 miles or so
and on my way back same thing that f'ing limp mode. I am so frustrated at
this point and have no clue to where to go from here.please help if you can i
just want my truck back on the road and cant figure this out. All of this started
with the install of the new engine what can i be missing that is wrong here..
thank you in advance