[CREWZIN]

Welcome to the forum. If you pulled the code and it's telling you that there's a misfire on plug #4, then I would suggest your rough idle is caused by the wire or plug #4.

Number 4 is the one on the far right when you face the engine. I know your said you just changed the wires and plugs. Your going to have to check them again, make sure the gap is good on #4 and the wire is seated correctly on both the plug and coil side.

The wire could be broken inside the casing so switch it with one of the other wires of the same length from the other side of the coil and see if the code comes up a different number.