i have an 89 bronco(of course), with a 5.0. i recently changed cap, rotor, plugs, wires, fuel filter, pcv valve. pretty much a general tune up, it ran fine before but it had been quite a while since its last tune up. i drive a company vehicle so it doesnt see a ton of action. but now when it downshifts at low speeds, when slowing, when you get back on the gas, it seems to shutter, almost like its missing. but idling and acceleration are perfect. so i checked plugs, and even replaced the wires again....to no avail. some one save me please.