Doesn't work with the 1 bar sensor, once patched-but I think that was suspected behavior? I'm still not ready to suspect the patched code, but I'm running out of leads to chase down.

Anyway, I'm going through the wiring harness with a fine-toothed comb, getting every input/output functioning as best I can figure it should, and improving the grounding anywhere possible. I am hoping to get a magic ground system that makes the communication link while running start working...from there it should be trivial to fix whatever problem I'm having. Lots of time crammed up under the dash with meter probes and wiring charts...