I had a similar problem with my Fiance's Neon too. Cylinder 2 was not firing at all. I popped the spark plug wire boot off of the top of the spark plug and it looked okay. A few days later, after a rainstorm it happened again and I removed the boot again...water was in there and I think it was causing it to arc! I just replaced the wires and plugs and it runs like new now. You have to watch that man. Must be another one of those Neon quirks.