WHEN I find a problem I tell my fellow rocker c/harley riders of problems, so yea guys/gals, change ur o2 sensors, you'll be glad you did, performance should pick up nicely, as it can read and keep you in your intended range as good as it can, wide band has a WAY BROADER RANGE OF FINE TUNING, THATS whats superior about these tuners, amongst a lot more, I've been learning a lot...if you check parameters its quite a difference, like my OLD FP3 was like 3 points up or down IF THAT,