I just bought a 1995 Neon as a commuter car to hopefully save a ton of gas money. The guy dropped the price because it suddenly had a miss fire that he said it didn’t have a month ago when he last drove it. So last night I mess with it and start pulling plug wires off the plugs one at a time while it’s running. All but one plug sparked the entire way while pulling it out of the tube and then sparked around the tube so they seemed to have a lot of spark. One plug didn’t spark much at all while pulling it out and seemed weak. The car did run worse after pulling the plug so it is firing some. I’m guessing it’s the coil pack but I would like to test it to be sure before buying new one. Can anyone tell me the best way to test it? Also, if anyone has ideas of what else could be causing the miss fire I would love to hear them.

Thanks!