granted, i didn't read the whole thread but i've had this same hesitation problem. I changed plugs, wires, fuel filter and coil (from 96 style harness to 97 up style harness). but when we were splicing the connection to the new coil we fucked it up. even though it was done on par with a chiltons manual it was wrong. my car was still misfiring and hesistating in the lower ranges and i was getting pissed off about it. long story short, 2 of the wires from the coil harness were in the wrong place, and that was the end of my hesitation problems.