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

[dodges15152023]

Update on this truck. I did remove VGT Actuator, I physically checked the turbo condition and manually actuated arm on turbo, felt smooth and no red flags, I did start unit and manually actuated arm and you could hear the change in exhaust and engine, did install calibration and re-installed all past. Attempted to connect with CT to no avail. So I have no new data to share at this point. I removed the ECM and connected a spare ECM. Keyed on and connected with insight and Turbo Speed was at "0". Connected fuel and harnesses for test, started and idled correctly and, turbo speed was present and moving along with VGT action. Left spare ECM connected and finalized install. Finalized programming. Truck will Feed 1st. rations this afternoon. Will update. Hopefully get more educated on CT after calving season. Thank You for access to Forum and the personal knowledge that was exchanged.