Does the miss improve if you richen the mixture? The idle mixture adjustment is a plastic knob on the ECU with about 20 detents, so you can count clicks and get back to your base setting. You could have a vacuum leak that causes a lean miss at idle at the offending cylinders at the injector o-ring seals, or in the seals in the intake manifold.

Poor idle could also be caused by insufficient valve clearances, especially the exhaust valves.

Are you sure the ignition system is working well? Might recheck plugs, wires, cap, rotor....