Originally Posted by
dave w
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
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