Do you run it all the time on that preset?
What is yours set to?
i was running it at boost 6 timing 2 fuel 9 but now at boost 8 timing 5 fuel 9 and it does pull harder 
Mine has been at B8 T5 F4 from the start. Im starting to worry why my fuel setting is so low, everyone seems to have theirs on 9 and mine is at 4

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Other presets are a poor fuel one which is set to B6 T5 F5 and the aggressive boost which is set to B8 T4 F8