i just went through this prob with any knid of slush snow or water....found out my two coild wires had insul stripped off them and taped up and then the wire on the harness for my tfi module was bare...fixed it and no probs so far....but first do a car, rotor, andplugs, plug wires......and make sure to put dilectric grease on all the connections...buy an actual tub einstead of the package they give you...