My sons civic won't start. We traced the no spark problem to the coil. After replacing the coil, it fired right up. It ran most of the day, that is fired up on several stops at friends houses; however, in the evening it quit... no more spark to the coil. When testing the issue again, we found the ground wire to the coil is hot? If we run a test light to the ground wire where it conects to the coil and probe the same wire on the outside the coil housing, it rejuvinates the coil and it sparks again... only temporarily? Help...