Check my O2 graphs and discussion, thanks!
94 LT1 stock PCM on heavily modified 402 with big cam: Can't figure out why a _new_ Right narrowband 02 (AFS75) (lower graph green) is tending toward/lazy dead rich when my FAST Right wideband 02 (lower graph purple) seems to be showing fine/lean conditions as expected (this was all just idling, revving, then a 2-step test at the end where the wideband goes dead rich at around 10:1 while cutting spark).
Top graph is Left narrowband 02 in red and TPS in blue (you can see the 2-step spike at far right end).
It's running around 2-3ms pulse widths at 900-1000 idle with 42# injectors.
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