I did put the old coil back on and it didn't start either! I think I was very careful in connecting the wires right, but could it be a crossed wire? there is only four wires going to the 2 posts atop the coil and be posts are different sizes so it only goes one way. I checked the ground strap and cleaned it but no juice. Now there is a wire that connects down at one of the retaining bolts: could it be crossed with the one atop the coil and produce no juice?