Any time that happens the first thing to do is as Soren said.....check the coil wires. They pop out REAL easy. Had this happen once when i hit a bump and luckily it was the first thing that came to mind. Pulled over and looked and sure enough it was just hanging there. Popped it back in and was on my way in less than a minute. After that i tie wrapped the rubber boots that hold them in.
