ok, um, dont know if you noticed, but i have 50k+ miles on the car. I have done ecu resets many more times than you can imagine. I have never had the hesitation problem at all it seems... well, you can slightly feel it, but it wasnt like others describe it. There aren't "gains" atleast not to my knowledge... Here is what i have experienced so far...
1. My car would cut off on first crank in the winter alot, and i replaced the o2 sensor TWICE and every winter, it came back.. well, now, when i crank the car, it does so smoothly, with no signs of giving out. So it wasnt the o2 sensor, for one, i found out that the o2 sensor isnt even doing anything on startup.. i think.. so here.. if you have read ALL the other threads, is a sign that it might just have something to do with fuel air mixture and how the ecu corresponds to the grounding. I have no clue myself.
2. Seeing as how i have reset the ecu MANY times, I know what and when and how it does things upon resetting.. and never before has there been a change like this.
We arent talking "whoa my car will do wheelies now!!" more like, better feel in half throttle around town manuevering, way more responsive throttle.. oh, and here is how you prove that to yourself.. go out in your crappily grounded car, and hold the rpms at 3700, and stomp on it. Now, ground the car like it should've been at the factory, go out, and do the same thing at 3700 and you'll definately feel the difference. The car doesnt wait, even for a millisecond, not that it was that bad to begin with, but it would get this "jumpy" feeling soon as you floor it.. now it just erupts.
pics up in a moment