RDOTC

If you follow the electrical out of the vgt control on the turbo it with go to a plug. I unplug those to get the turbo out of the way completely. Ratchet wrenches with flex heads work pretty good for the back bolts. I always pull the outside bolts then the rear front bolt and spin the turbo to help loosen the bolts in the rear rear if that makes sense. 

So here is the deal. I'm helping a friend with an older mack with the E Tech in it. He just did a motor swap and had the ECM reflashed for the reman motor. The problem is it is still running poorly and throwing a code saying mid:128 sid: 231 fmi: 8 blink code 6-8. We did a cylinder cutout test and got no change in how the motor runs with cylinder number 5 cut out. That tells me number 5 is dead. We checked the eup, injector, cam, lifter, timing, ran the rack on it twice, and pressure tested the cylinder. I know the code is for the data link on the J-1939 but would that have anything to do with number 5 being dead? Any insight or help would be awesome.