Tuning Help 2007 Yukon XL 6.2L swapped to 6.0L

[junksterr]

Good Evening,

I recently motor swapped a 6.2L out of my 2007 Yukon XL that had DOD with a 6L80E Transmission AWD. It was replaced with a 6.0l, with VVTI deleted, chevy hot cam added, factory muffler replaced with a magnaflow, and exhaust straight pipe from Catalytic Converter out to muffler then exit.

I have an older MPVI Tuner and have everything set up. I am looking for help tuning the truck.

It will not start easily, it stumbles extremely bad. I can get it to start by turning it over multiple times and it finally catches, or I can bleed the fuel rail manually while someone is cranking it and it will start. After that it runs fairly well, but the transmission shifts hard going into higher gears and then shifting down.

Could someone help get me started with this? It would be greatly appreciated.

Posted the Info Log below.

[junksterr]

1/21/2024 4:20:21 PM
VCM Suite Product: VCM Editor 5.0.4

Operating System: Windows 11 (build 22631)
Microsoft .NET: 4.0.30319.42000, 4.7.1 or later
CPU: AMD Ryzen 9 6900HX with Radeon Graphics
Available Memory: 7,882 MB


Device ID: 1112617493
Available License Slots: 406/409

[Specific Vehicle]
2004 Pontiac GTO (8 cyl), 0KA026333240, [GTOscout], (GM: 2)

[Vehicle Type]
2001 Chevrolet S-10 (6 cyl), (GM: 4)


ID: 1112617493
Hardware: 0121
Firmware: 0121
PartNumber: 0000006221
BuildDate: 7/27/2009 12:00:00 AM
InterfaceOnTime: 00:00:13.7150000
ROM: 00 3F 00 82 00 01 00 00 FF
Config: CC 00 00 00 00 40
System Info: F7 00 00 00
Comm Errors: 00 00 00 00 00
SPI Info: 00 00 00 00 00 00 00 00
VehicleConnectedTime: 00:00:13.7150000
DetectedProtocols: CAN


Protocol Info: ISO 15765-2, J1962: CAN, 500 kb/s

ECM: 7E8, CAN - E38, GM Gen4 V8
VIN: 1GKFK66827J278475 - 2007 GMC Yukon XL 1500 Denali, 6.2 L, V8
Serial: 86YPLAK16291RP5P
Programmed State: Fully Programmed
OS: 12614088
Calibration IDs: 12614088, 12623214, 12614214, 12614295, 12616100, 12614105, 12605899, 12605916
Calibration VNs: 00000F82, 00000F95, 0000D7D5, 000095A9, 00004F15, 0000FE38, 0000C846, 0000B680
Basic PIDs: 43
Trouble Codes:
P0010 - Intake (A) Camshaft Position Actuator Circuit / Open (Bank 1) (Pending, Current)
Controller Type ID By OS: 5010

None: 7EA, CAN - T43, GM A6
Serial: DV0651Q033227806
OS: 24239353
Calibration IDs: 24239353, 24242128, 24242126, 24240661
Calibration VNs: 00009236, 00003766, 000082EB, 000074EF
Basic PIDs: 7
Controller Type ID By OS: 60

[GHuggins]

You need to post the log and tune file. Log of cranking and it running and the current tune it's running on.

If "bleeding" the rail makes it fire right up then you might want to put a pressure gauge on it and see if the pump and regulator are bad. It should build and hold pressure. The amount of held pressure will vary depending on the regulator, but pressure should immediately build to 58ish psi and hold around that for a little while after key off. Almost sounds like your regulator is bad.

[edcmat-l1]

Yeah no telling what it is without a data log. Could be multiple sensors unplugged or not reading correctly. Unplugged ECT would cause it to be super rich on start-up.

[junksterr]

Current tune is what ever the factory tune was for that year model with a 6.2 and DOD. Is there a way to obtain that tune using HPT to load it here?

I will check the fuel pressure and regulator this week and report back, I do not think there is an issue as the engine installer told me the pressure to the rails is correct, that it needs to be tuned to start easily. However I understand that it is hear say and I will have an accurate reading myself.

[junksterr]

I will check on everything, get a data log from key on to initial start up, and report back. I appreciate the advice on where to start.