L31 411 4x4 swap

[Dewman67]

Hi guys, I'm pretty new to all this . I'm sure it been ask but
What is needed in the ecm to make 4x4 work on a l31 411 swap? It probably as easy as a segment swap, but any help or links to the info will help. Thanks

[dave w]

Are you going to use Coil On Plug ignition on the L31 like the LS engines do?

dave w

[Dewman67]

No, starting bone stock dizzy, spider injectiors, and all. I have another motor with 24x conversation, with a elderblock proflo, with rails and 42 lb injectors.

[dave w]

Some 2002 Express Van used the L31 engine and '0411 PCM.

Gearhead-efi link for stock 2002 L31 .bin files: http://www.gearhead-efi.com/Fuel-Inj...rPro-Bin-Files

dave w

[Dewman67]

Thanks, got that part, I have the stock bin file, 411 ecu, punouts and all the stuff needed. Only question I have is the 4x4 stuff in the tune. Express vans did not come 4x4. Looking for anyone that have done the 411 l31 swap on a 4x4 to see what needs to be changed in the tune.

[dave w]

I have not done the swap your asking information for.

I'm thinking 4WD Low is the concern. The transfer case will signal the PCM that 4WD Low is engaged, usually with a switch on the transfer case sending ground to specified pin on the PCM. The thinking I have is 4WD Low shift points for an automatic transmission will need to be compensated for.

Maybe "compare" a 4WD .bin file with the same Operating System (OS) as the L31 .bin file OS. Maybe your using OS 12216125? The link above has '02 Chevy K1500 5.3L OS12216125.bin

dave w

4WD.jpg