Could be bad wires and or plugs.... I had a misfire and it was a wire.
You can check wires by placing a long screw driver into the boot and have it positioned such that it can arc to something metal (ie) engine block - um...don't be holding the screw driver when the car is turned over. If you get an arc then you know at least that wire is allowing current to pass to the plug.
Plugs are cheap.... as are wires...
But discharged fuel can cause your catalytic converter to overheat and breakdown....its a problem you want to fix quickly.
GO BABY GO! 
