Quote Originally Posted by dave w View Post
Attached is a Stock 2002 Express Van 5.7 liter with 4L80E .cal file.
Also attached is the "Compare" summary .txt file.

The Express Van will have a different gear ratio and tire size, so the transmission shift parameters will be very different.

I wonder if the attached 5.7 flash, which has VATS Disabled, is worth trying? Sometimes, tuning requires starting from a different baseline flash. I've sometimes had to start all over, with a different flash and make "baby steps" to get a good tune. I often make only one change at a time, to verify if the "one" change is good or not.

dave w
I admittedly have no idea what im looking at when it comes to tuning. Jeff created this for me (and has been very helpful in trying to resolve this) and im just trying to get input on how a base tune should get built using EFIlive or HPtuners since tunercat doesnt exist around me.