Engine misfire?

1995 honda civic 118000 miles

My car runs fine when you first start it cold, but when it warms up it runs on three cylinders at low rpms and gets worse as it gets hotter. When I stop at a light its also worse for like 3 seconds when I go again. At first I thought it was my head gasket, but could it be my fuel injector.

I was driving on the highway the other day when out of nowhere my car began running really strange. It sounded allot louder then normal and almost had no power. I figured out that one of my cylinders did not seem to be firing and I was only running on three. I located which cylinder it was by pulling plug wires once at a time to see which one had no change in the engine idling. I determined it to be the 2nd one from the side where the distributor cap is on.

I also noticed that the spark plug for that cylinder was wet from fuel not being ignited. So I tried changing the plug wires which had no effect. I also changed the whole distributor cap and rotor as well but still there is not change. I noticed however that there seems to be electricity coming from the distributor on that pole, because when I put the wire close to it while disconnected I can see and hear a small spark of electricity. Now I'm totally puzzled as to what the problem could be, does anyone have an idea?