Isx cm2250 exhaust gas pressure

[JMBT]

I like Rawze's ideas -turbo out of calibration, and -CAC leaking. You mentioned you replaced the turbo actuator, I don't know but is that one of the parts that requires an update to ECM to function correctly. I was reading on quickserve one day and saw a bulletin about certain parts, that when replaced, because of a change in the part's design or functionality, may require an ECM updAte depending on your current calibration. If the turbo actuator fell into this group it may not have calibrated the turbo properly when you installed it with insite?? Just a shot in the dark, but maybe. What percent is it commanded and what percent is it actually closed when you force a regen?
A CAC leak or other intake leak could cause chuffing and an exhaust leak before the DPF can cause more frequent regens. Just some ideas, hope it helps.