Hi, this is my first post. I have a white 2000 ws6 which I just got out of the shop. I just had the flywheel replaced to cure a vibration and had the rearend completely rebuilt except for the axles ( 2 different shop stays). Well since the flywheel was replaced, the engine seems to just lose spark at random times. When I start it back up it will run really rough and I have to keep my foot on the gas to keep it running. The tach just sits at 0 when its acting weird . Has anyone else had this problem? I beleive a sensor is to blame, but I don't know which one.