[3echo9]

Does the hesitation ever occur when your are trying to accelerate after coming off a ramp onto the interstate? I had a similar problem and it turned out to be a bad valve in the tranny. It seemed to just act like it was starved for fuel but what was happening is that the tranny wasn't able to downshift due to a lack of oil pressure due to the defective valve in the tranny. If not, have you checked fuel line pressures?