I'm guessing one of the plug wires is bad?
*edit...(this is just a copy/paste)
thats a coil 1,2,3,or 4 primary circuit failure. Have you checked for spark at each plug wire one at a time? You should have power on red/green wires to both coils. Then you should have a pulse on the other wires on the coils. You can use a test light and with the engine running see if you get flash from the test light while back probing the connector to the coil. Sounds like you either have a wire problem or a PCM bad.