Hello, I am new to the forum. I have a 99 xp limited I had gotten 3 months ago. I have only been out a few times and it ran great the first few times. One day I could not get over 30 mile hour and could feel it only firing on one cylinder. The front one, and could feel the rear cylinder hitting once and a while. Brought it in and replaced the plug. Took it out ran great once again after a few runs it cut out again. I have cut the wire a 1/4 inch. Looking at it today I swapped the wires and coil and still on the rear cylinder so I don't think I have a wire or coil problem. If i pull the wire away from the plug to jump the spark it seems to run better. Please help thanks.