When I maxed out my injectors, all was fine with the A/F below 6000 RPM. I could richen and lean as I needed to (with the S-AFC on the dyno). No matter what we did above 6000 RPM, the A/F ratio dropped off. Didn't run lean throughout the band, just up top where maximum fuel flow is required. No codes or anything like that, because where the injectors weren't up to snuff was way out of closed loop operation, and they were sufficient for fuel needs during closed loop.
