Popping Under acceleration

[Rawze]

(08-29-2026 )Phoenix6189 Wrote:  Yep, you caught me, 2012 Volvo 780 with Cummins 2250, and 13 speed Eaton Ultrashift Plus. 3.55 rears.

OK, CAC is stock with 3 or 3 1/2 inch piping. Considered low HP 455. CPL 3719.

Factory program installed for testing purposes and I believe its a little better.

So changed out cylinders 1,2 with 4,5. Popping stops when shutting off 4 and 5. The exhaust cleans up when I shut those off as well.

So I believe someone knocked the injectors off my table, and no one want to be responsible, so I had to figure it out the hard way. The Shop I'm working at has a few different people coming in and out working on different things.

I'm sure I'm having problems with 1,2,4,5 injectors. Just going to find a six pack to install. They were fine before the head gasket issue.

are all the parts OEM certified?.. or something else?... because I have never seen after-garbage or "non-OE repaired" injectors that were worth 3 cents, nonetheless good enough for a commercial engine.