Im going to say all scanners call cylinder 1, cylinder 1. They may not present data in terms of "firing order". But a misfire on cylinder one is, say, "P0301"...hence whatever the hex/binary string the DME has output should be interpreted by ALL scanners as 'cylinder 1'. It is the DME in the car that detects a misfire, decides which cylinder was the culprit and then formats the error output....