i just recently installed the powerlogger,so not real familiar with it yet,but i adjust my fuel and timing thru the TT chip. turn key on while watching scanmaster, bring up lv8. the chip has parameters 1 thru 4 you hit the gas 3 times and let off and the # will be 1 if you hold gas down it will move, then you scroll scanmaster to the blm and adjust those #'s up or down. for example parameter 1 is wot fuel i believe so when you adjust the blm # up is more fuel and down is less, default is 128 so a higher # is more fuel and lower# is less. you will also have a parameter for 1st and 2nd gear timing and 3rd and 4th gear timing and 1st gear fuel, i don't have the chart in front of me,so you need to look at the instructions with the chip