Can anyone help? I have a 2015 Electra Glide FLHTP. My bike has been going into 1 cylinder. When I would turn the bike off then back on it would go out of the 1 cylinder and run like a champ. NOW, it won’t go out of one cylinder. If I try turning the bike off (like I was doing) it will go out of the 1 cylinder but a 1/2 mile up the road it goes right back into 1 cylinder. Please help! I’ve asked everyone I know (even people that work at Harley) and no one knows!

 

Start by pulling codes. Check spark plug wires. Which cylinder? Front or back?

 

Check the front spark plug wire where it goes under the tank for damage from rubbing.