I've got a 2000 electra glide classic, stock, 88 CI. FI. At Random it will missfire go down to 1 cylinder. whether its cold or hot 75mph or 25mph. Also when slowing to stop and pull in clutch it will die. had it into the shop last fall and they had it 5-6 weeks and they couldn't figure it out!!!! so it has to be something really stupid!!! any suggestions would be great