I have a 88ci. 03 Flsts. while I was riding down the Interstate about 75mph my motor just shut down and while coasting to the side it sounded like it would pop a little. tried to crank it up and it would backfire through the exhaust. I've changed the crank sensor, ignition module,coil, I haven't changed the map sensor. do you think that influence the timing that much. I also haven't changed the plug wires ever. bike has 130,000 on it. any input would greatly appreciated. thanks,