2018 L83 6L80 FPCM delete issues

[71buickfreak]

I have a 2018 L83 and 6L80 installed in an OBS Chevy. Running a static fuel system. Vats Deleted, DOD turned off, etc.

It runs, fires up no problem. It drives, well it did until today, starting driving funky, and went into limp mode when I was trying to put it on the lift.

What do I need to do in the tune to fully turn off the FPCM? I do not have one, the wires have been deleted on the harness I used. I will post up the codes when I get back to the shop, but I am struggling a bit here. I am not a tuner, but I amd the one doing the tuning. I am not looking for more power, just getting it to run and drive reliably.

[71buickfreak]

Additional information- The throttle pedal no longer has any response from the engine. I have the scanner on, the pedal % changes when I press it, but the TB does not react at all.

[GHuggins]

You just change the pump setting to not having a fpcm and then at least me personally, I set fuel pressure to what the vehicle is running on.

[71buickfreak]

I did figure that out this evening.

The throttle raises and lowers a couple 100 rpm at idle, ideas on that? Also, now that I fixed the fpcm setting, it revs in idle and just hangs there for 10-15 seconds.

[GHuggins]

Post the tune. There are several dtc's that need to be turned off too that I forgot to mention earlier.

[71buickfreak]

OK, so I sent some time dealing with a few other issues, getting back to this. I thought I had it sorted, but it went into limp mode again. Happens after about 2 miles of driving. here is the list of codes-
0x556: U0121 - Lost Communication With Anti-Lock Brake System (ABS) Control Module (Pending, Current, Old, History)
0x556: U0140 - Lost Communication With Body Control Module (Pending, Current, Old, History)
0x556: U0401 - Invalid Data Received From ECM/PCM (Pending, Current, History)
0x7E8: P0073 - Ambient Air Temperature Sensor Circuit High (Permanent)
0x7E8: P0097 - Intake Air Temperature Sensor 2 Circuit Low (SES, Pending, Current, Permanent, History)
0x7E8: P00F4 - Humidity Sensor Circuit Low (SES, Pending, Current, History)
0x7E8: P0161 - O2 Heater Circuit (Bank 2, Sensor 2) (Pending, Current, Old, History)
0x7E8: P0171 - System Too Lean (Bank 1) (SES, Pending, Current, Old, History)
0x7E8: P0174 - System Too Lean (Bank 2) (SES, Pending, Current, Old, History)
0x7E8: P018C - Fuel Pressure Sensor B Circuit Low (Pending, Current, Old, History)
0x7E8: P0650 - Malfunction Indicator Light Control Circuit (Pending, Current, Old)
0x7E8: P0685 - ECM/PCM Power Relay Control Circuit/Open (SES, Pending, Current, Old, History)
0x7E8: P10E1 (SES, Pending, Current, Old, History)
0x7E8: P135A - Ignition Coil Supply Voltage Circuit 1 (SES, Pending, Current, Permanent, History)
0x7E8: P135B - Ignition Coil Supply Voltage Circuit 2 (SES, Pending, Current, Permanent, History)
0x7E8: P2160 - Vehicle Speed Sensor B Circuit Low (SES, Pending, Current, Old, History)
0x7E8: U216A (Pending, Current, Old, History)

[71buickfreak]

It keeps going into limp mode any help would be greatly appreciated.

[71buickfreak]

Bump for some assistance. Still going into limp mode.

[ELIOTH CUELLAR]

hey I'm new here and yesterday I was turning on an obs 5.3 gen v 2017 and I had a problem that the accelerator did not respond because of the code p135b and another code that I had was p0201 I solved them and magic I got accelerator
I also have several files from 2017-2018 in case they are useful to you I have stock and I have a tuned engine and transmission2017 5.3 ECM AND TRANSMISSION ''NO STOCK'' CHEVROLET 1988.hpt2018 5.3 SILVERADO STOCK ECM MOTOR ONLY COMPATIBLE 2017-2018.hpt2018 5.3 TUNED WITH 6 SPEED TUNED TCM COMPATIBLE 2017-2018.hpt