I hooked up my E38 PCM into a PSI Conversions aftermarket harness and connected everything on the engine. I tried to start it and it won't start... The fuel pump is not connected to the ECU and neither is the starter relay
I believe I have disabled VATs (I went to "OS" and disabled VATs 1& 2).
I checked the codes and the following are coming up:
Codes Description Explanation
P0443 "Evaporative Emission Control System Purge Control Valve Circuit" EVAP has been removed from harness
P0449 "Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction" EVAP has been removed from harness
P0452 "EVAP Pressure Sensor/Switch Low" EVAP has been removed from harness
P0463 PCM input signal from the fuel gauge is higher than the actual level of fuel in tank tank. Fuel Level Guage is seperate from PCM
P057C Brake pedal position (BPP) sensor - circuit low No provision in the harness
U0109 Lost Communication with Fuel Pump Control Module (FPCM) Fuel Pump turn on is a seperate switch
P0641 "Sensor Reference Voltage A Circuit Open"
P2123 Throttle/Pedal Position Sensor/Switch D Circuit High Input
P2127 "Throttle Position Sensor E Circuit Low Input"
P2128 "Throttle Position Sensor/Switch E Circuit High Input"
The first 6 I expected /am not surprised. The last 4, I have no idea...
Does anyone have a recommendation for how I can get this engine to start?
Edit: FYI, this is a 5.3 with 6l80 out of a 2012 Tahoe that has been put in a 1954 Chevy Pickup Truck.