i just used the checksum that TPV4(or V5, i'm not really sure which did it) calculated when i imported the ADS... though i'm not sure of which of the options GM ECMs do...
really? because if i set to 1's compliment i get a checksum value exactly 1 below what the previous checksum was calculated as after i remove it, while 2's compliment gives me the same number as the checksum that i removed...
robertisaar wrote:really? because if i set to 1's compliment i get a checksum value exactly 1 below what the previous checksum was calculated as after i remove it, while 2's compliment gives me the same number as the checksum that i removed...
You are correct; 2's compliment. Sorry for the missed key.
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TunerPro Author
1989 Trans Am