So I have installed a LQ4 in my 2003 Avalanche where it once had a 5.3. The engine is stock except for tbss intake and throttle body, x-link, 05 e-fans and harness, 4 inch intake tube to modified stock filter box, 3.5" duramax exhaust w/ Jones 30" x 3.5" muff. The truck runs pretty good but the tune needs modded. I have turned on the fans and set it up to mirror a stock 05 operating system for the fans.

Here is the question, Can I morf the 5.3 tune to a stock lq4 tune say from a 05 and leave the injector info alone since I still have a fuel return system. There are quite a few differences in fuel, spark, torque management, ect.
The truck I looked up was basically a 6.0 1500 with the 60e trans so it most closely matched my truck.

If someone would be willing to look I will figure out how to post the stock one I'm currently running and the Modded tune I would like to run.

Thank you, Jeremy

 

I would start off by using a stock 6.0 VE and timing tables and go from there. do you have a wideband? It will make it a lot easier

 

which injectors are you using?

 

I have a wide band but don't have it installed. The injectors are the stock 24s from the LQ4. I modded the stock fuel rail to clear the wider tbss intake and also to retain the fuel pressure regulator with vac reference.
Other than the oe intake, larger intake tube and 3.5" exhaust it is a stock engine. I need a tune to start from and thought if I copied a stock 6.0 tune into my truck from a newer one that I would be able to achieve that.

 

dont load a tune in from another truck. change your engine size to a 6.0 in the general tab

 

I took a copy of my truck and changed every thing that was different when you would compare the 2 files. F2 to F3 and F4 for the difference figures. The only tables I did not change anything in was the injector table because the newer truck has returnless fuel system.

 

how do I get my tune and the file I copied from posted up so someone can look?

 

Reply>Additional Options>Manage Attachments>Browse>Pick from your documents or wherever you have your Tune/Logs saved