erractic running

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Aug 13, 2015 | 07:17 PM

ewoods8393

Thread Starter

Cruiser

Joined: Apr 2013

Posts: 120

Likes: 0

From: Western New York

erractic running

Have a 2012 flhx. 7K miles , vance and hines, stage 1 air, no cat, true duel and se programmer.
Seems to have developed a miss. Once in a while it starts to run rough. Hit throttle and it levels out for a bit but does it again soon. Listening to the exhaust it seems to be coming from the rear cylinder. Changed plug didnt help. Put a spark tester and when it starts to act up I see no difference in the spark. I have one on each cylinder. I wanted to test the coil but the book I got from harley for 65 bucks doesnt tell you how to test it. Does give the values however. Just not sure how to test secondary and primary coils without some direction. Even when its running good it seems to have slight miss from rear cylinder. Any direction would be appreciated.

Aug 14, 2015 | 09:51 PM

woodybear

Cruiser

Joined: Aug 2010

Posts: 116

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Ewood I have a 2012 Heritage Softail that seems to have the same problem so I'll be following this thread to see what type of response you get. Thanks for posting this.

Aug 18, 2015 | 10:26 AM

mndelrosario

Tourer

Joined: Jul 2014

Posts: 496

Likes: 33

From: MA

I also went stage 1 with Fp3, V&H dresser duals,and their mufflers. Having the same sort of issue on my 2015 street glide. Running extremely off, trying to run auto tune to see it if helps.