'06 m7 with weak spark?

had the sledc out today and went a few miles and it fouled a plug? never fouled a plug on this sled with 1800 miles on it. thought that was strange but i changed them on the snow, what a pain in the *** by the way, never changed them with the pipe hot...that sucked. rode about 50 feet...same thing again. one plug was wet and one dry. the pto side was wet. checked spark and both cylinders were weak on spark but it still ran, not very well, but enough to get back to the shop. havent looked into this yet but i was thinkin either coil or stator. any ideas? how do i test the stator? coil? any help or suggestions will be greatly appreciated

thanks
joey

nobody has any ideas? nothing? comae on even dumb ones just to get the ball rolling...