With a directscan or powerlogger you can view all the blm cells in the 16 cell grid If while your slowly accelerating you see the blms are all high of i28 thats indicating that its running lean based off the chips programming (if the fp is correct something thats you cant fix with the chip settings it requires the attention of the chip burner), if you have a translator you can use it to remove some fuel to help the condition as the rpms and maf increase it shows the respective cells stored blm value. If you look at the scanmaster blm as you drive through the rpm range you can see the blm change, not because its changing but that you're looking at the different cells.
and it adjusted to 118 which is the ecms way of fixing a rich condition of (ecm lowers blm to remove fuel) Eric uses the blm in cells 12-15 for the user to make adjusment to the chip (5.6 chip), yes low is less fuel and up more fuelīut the ecm also adjusts constantly as you drive and stores the blm in cellsĪt idle you're looking at the #0 cell and the ecms adjustments for what the o2 sensor sees.