There is no scanner data that would tell you an individual cylinder is rich.
I agree. I also know from using a Snap-On scanner for many years that they do not always have correct data for a particular ecm. And the vehicle being worked on is so old Snappy has no interest in updating it.

Whomsoever wields the answer, wields the power of one can of pop.
It's killing me. There's more suspense here than between episodes of Breaking Bad.