You change the maskID to AA while emulating, I've always changed it back when done, I don't know what it would do to ECM if left at AA?
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You really shouldn't have to disable the checksum for chip burning. When you save the file, TunerPro should update the checksum for you.
Disabling the checksum prevents the ECM from "verifying" the binary file on the chip. Normally, it looks at the checksum to verify that the binary file is not corrupted.
I think the reason for AA to disable checksum while Emulating is because your changing the bin live...
Moates has instructions on their website. If you need more than that start a thread and I'll try and help.
I only change it to AA on that chip to make sure it wasn't a check-sum fault that was causing my blinking CEL. when putting the 8747 bin in my 7747 to see if it would work. it didn't.