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For example, if you are at 1200 rpm cruising, you tip in to id mid throttle and map kpa goes from 45 or 50 kpa up to 75-80 kpa and you feel a delay/hesitation between throttle input and actual acceleration, I would bet its lean during that tip in. Add 5-10 percent at that higher load kpa, save the file as a new file and try it. If it helps, tune it by feel as far as the tip in goes, at the end of the day, fuel trims and wideband accuracy on certain setups just aren't good at lower rpms where the engine isn't efficient. Sometimes the overlap of camshafts will cause false trimming of fuel, and on boosted setups, you have to think you may be going from 50 kpa to 110 kpa or more on tip in. Lead the fueling on the ve table a little bit and try it, or in other words intentionally make it a little rich and see how it acts.
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