I have the hesitation too, its always there in 1st and 2nd gear, if I shift to 2nd from 1st at low rpm(2k-3k), the car hesitates then slowly back to normal, the feel is just like you release the throttle for a bit then push it down again. And I have another problem, when I start the car from 1st, there's a lag, the RPM goes up REALLY slow from 1k - 3k, once it past 3k, it climbs fast as hell.
I tried many ways to kill the hesitation, I bought MSD ignition, Greddy spark plugs, Magnecore 8.5mm wires, a bottle of NOS made fuel injector cleaner, throttle cable adjustment. NONE of these helped. A few days ago I tried leaning out the fuel at low RPM range on my VAFC, from 1K - 4K, all the way -4, now the hesitation is almost gone, and low end pulls a little bit harder than before.
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-- No Tune, No Life --
Michael Li
-- 1997 Prelude 5spd--