97 Tacoma engine miss

Toyota tacoma extended cab, 3.4l v-5 engine, 158,000 miles on it. Initially my check engine light came on and it said #1 cylinder misfire so I replaced the 3 ignition wires, changed the plugs. It seem to run better but it bogs down when I mash down on the accelerator. If I gradual apply the gas in a smooth manner it won't do this. This even happens on the interstate w/cruise control on and you go up a long grade, it will miss out.