well you can just get a coil pack from autozone to try and if that doesn't fix it, you can just return it i had the same problem on the se before and thought it was my coil pack but it ended up being my wires. had bosch wires on there for about a month that fixed the misfiring but then it came back and actually started to melt one of the boots on the wire. ended up getting some autolite wires and those ran pretty well.