nolant

Thank y'all for all the help ended up being #2 injector I would have never thought it to be that.

thats what i thought..this one does not have engine brake.

My computer is showing 95

ok i understand that but wouldnt a new harness from mack have the updated end connectors? because i already put a new harness on it.

It was sid 3 fmi 5

truck was berly running when i got to it i put my computer on it and was calling out #1&3 injectors cleared the code and it cleared up sounded good for about 5 min then right back to same codes. got it hooked back to the shop replaced those 2 injectors started it same problem so i figured engine harness the plugs looked pretty bad and were brittle well replaced it same problem. last thing i could think of ecm right swapped it with one we had off another truck that was running fine still same issue. im lost on this one.