04 FLHRSI with SE 95", heads, 257 cam, intake and D&D 2-1. Did a 300 mile ride Saturday and the bike ran great, but the CEL kept coming on when climbing gradual hills. I pulled the code when I got home and it was a P1356, rear cylinder misfire. I did not feel any miss, the power was smooth and strong, normally a miss is very evident on a twin. The light comes on pulling a hill or accelerating, usually over 55mph. I pulled the plug out and checked it, cleaned some of the anti-seize off and made sure the boot was connected good, still getting the light. Got screamin eagle plugs in it. The bike seems to have a pretty good tune on it, has some decal pop, but not very loud, I assume some of that may be from the cam overlap. Any ideas?

 

Plug, plug wire, or coil. About the only things that affect ion-sense - which throws that code.

Go hand over hand on the plug wire to ensure it's in good shape and pull the boot at the coil to make sure it's not rusty or full of water.

Beyond those simple checks, might be time to start changing those three things out starting with the plug.

 

I've been dealing with the same thing. Changed the plugs with no luck.waiting on wires to show up to replace them. In the mean time,I found out my battery was getting weak. Haven't had the code since I replaced it.

 

Thanks for the info guys! Any plug wires you recommend? I'm brand new to the HD world, just switched over from sport bikes.

 

Stay with stock HD plugs and wires. Some may swear by other brands but any GOOD tuner or builder will only recommend oem ones, theres a reason for this and the resistance values are correct with OEM.

 

https://www.hdforums.com/forum/ignit...ally-mean.html

This probably has nothing to do with your issue, but I found the link above interesting maybe worth the read. The year modles are close to the same. Good luck with your issue.

 

Have also read where a pin hole in the fuel line inside the tank can cause this issue as well.

2010 Limited with some stuff

 

Yes, this happened to me. Check fuel pressure.
see:
https://www.hdforums.com/forum/touri...ml#post9200215

 

Had the same thing happen to my bike,turned out to be the caps on top the plugs came loose.long shot but worth a quick check.

 

Well I did the in tank lines preemptively, I have a big ride tomorrow and didn't want to be wondering the whole time. Need to go test ride, but here's hoping!