2014 Freightliner Cascadia DD13 Engine Swap Problems

2014 Freightliner Cascadia DD13 Engine Swap Problems.
Engine starts but won't stay running without an override.

Damaged Original DD13 Engine Serial # 471927S0211556
2014 Freightliner Cascadia Vin # .....ELFP5206
Engine Year Manufactured 2013

Replacement DD13 Engine Serial # 471927S0348234
2017 Freightliner 114SD Vin# ......8HHK3599
Engine Year Manufactured 2015

Used Original wiring hardness and Original ECM with Replacement Engine.
Is the wiring harness bad or the ECM?
Do I need the ECM from the replacement engine?

Hasn't ran long enough to warm up in order to trigger some of the fault codes and that is why I think it is something else besides faulty sensors.

Deleted Codes and they came right back.
Currently 7 Engine Faults on Replacement Engine
SPN: 3510 – Sensor supply voltage 2 FMI: 4 (Voltage Below Normal)
SPN: 94 – Engine Fuel Delivery Pressure FMI: 4 (Voltage Below Normal)
SPN: 723 – Engine Speed 2 FMI: 11 (Other Failure Mode)
SPN: 3563 – Engine Intake Manifold #1 Absolute Pressure FMI: 10 (Abnormal Rate of Change)
SPN: 5927 – Engine Coolant Pump FMI: 2 (Erratic, Intermittent, or Incorrect)
SPN: 807 – Dif 2 - ASR Valve FMI: 8 (Abnormal Frequency, Pulse Width, or Period)
SPN: 3719 – Aftertreatment 1 Diesel Particulate Filter Soot Load Percent FMI: 31

 

We used the EMC and wiring harness form the 2014. They should both be the same emissions level. Before we started the engine swap, I contacted Freightliner and gave them the serial numbers to both engines. They said the engines were the same part numbers and would be compatible.