[scarceller]

One more point: if you look at the intake you will notice that the throttle body is skewed toward the driver's side, this favors air flow slightly to to 1-2-3 side. Meaning that you get slightly more air flow toward that side, the air is not 100% even between 1-2-3 and 4-5-6 but it's not much different. And if the air favors the 1-2-3 side that would result in slightly leaner reading on that side but what you have shown above is that 1-2-3 runs richer than 4-5-6.

Again, my suggestion is swap stock injectors between banks to be sure it's not injector related.

Then, within the DME it has only one single transistor that fires all 6 injectors at once, I doubt the issue is DME internal. But it could be injector harness related, be sure the big harness plug near the drivers shock tower is clean and tight. Also with key in RUN engine off check the 12volt pin of each injector harness that plugs into the injector. Be sure they all have exact same voltage reading. You can also check that voltage level with engine at idle for each injector, you will need to back probe the injector plugs to do that.