cm 871 regen fail

[NavistarIH]

got a cm 871 that fails to regen. remove and cleaned dpf and doc. both were in good shape and were cleaned properly. (reset in insite) cleaned the dpf deltap sensor tubes. cleaned the egr deltap tubes and ports. cleaned imap sensor. also cleaned the doser. had a major exhaust leak after turbo that was repaired and had a major exhaust manifold leak that was repaired as well.when i do a forced regen on a cold engine the readings are as follows:

egr diff pressure = .05 to .07 (fluctuates)
egr valve pos = 0%
egp = 120-130 (fluctuates)
imap =12inhg
percent load = 0
turbo act position = 89%
turbo speed = 42000-43000 rpm.

the engine will ramp to 1100rpm and doc heat will build to around 525 and it will start to dose. dpf temps will raise to around 650-700 and the doser will close and temps will drop back down to 470 deg on doc. the temp will then fluctuate to 500 untill the engine fan kicks on and lowers it back to around 470. it will be stuck in this cycle until i stop it. after the engine is warmed, when a regen is attempted the temps will never get past 480-500 deg while cycling the engine fan. these are the readings at that point.
egr diff pressure = .5 steady
egr valve pos = 0
egp = 150-160 fluctuates
imap = 18-22 fluctuates
percent load = 0-4 percent depending on fan
turbo act position = 88-92 fluctuates but stays mostly 88-89
turbo speed = 53000-58000 rpm fluctuates