ISC CM2250 Idle Surge, no active codes, zero accellerator/ throttle response

[dodges15152023]

Fuel pressure command in my opinion is not enough in my opinion,maximum commanded is 11306 and measured is 13686 when running/surging, truck has been off for over an hour,pressure when key was cycled off to on after running was 8473 commanded and 8909 measured and current pressure is holding at 8867. I put a new Cummins high pressure fuel pump assembly to try new angles and have connected a davco fuel processor to support supply circuit. This truck typically idles at 12,250 psi to 13,780 psi according to my records and logs.
Turbocharger Speed still at 150000 default and 4 commanded and 4 measured.
This truck has 25000 hrs but is aggressively maintained. And performed flawless the morning before.

Additionally and worth noting maybe is Fuel Pump Actuator Duty cycle is never over 50 percent at anytime, shows fluctuations from 30's to 50.