I have the same hesitation issue right now. You get on the gas and you start accelerating, but then there is this momentary lag for just an instant, and then you're back to accelerating again, right? If so, I'm getting this from lower RPM's also, not just above 3k.
Coil #6 went bad awhile ago. Replaced. Hesitation still there occasionally. Knock sensor is now bad. Bypassed temporarily with 470k resistor. Hesitation still there. More frequently. Tracked timing on OBD-II logger while driving. Lag does not follow timing advance/retard (thought it might have been related to the knock sensor), so it's not that.
I'll try this Coil #2 trick with wrapping the boot.
While I'm ordering my knock sensor, I think I'll probably order another a front and a rear coil for not if but WHEN I need them, and some other stuff too.
