Hondata

Forum, I've been struggling to get my car to behave with the Flashpro tunes, but I'm consistently hitting a wall as I'm a novice at tuning. On advice from a previous post, I adjusted the 'AFM flow' table to get A/F ratios more consistent and ensure my fuel trims are close to zero (0). My datalog 'Graph' shows S.TRIM fluctuating as expected but L.TRIM never moves from -100% no matter the adjustments, nor the time driven. The 'XY Graph' shows the expected Mean for 'short term trims' but nothing for the long term. What can be causing that much fuel subtraction?

It may just be a translation error. There is no such thing as -100 long term trim. Your AF seems to be ok.