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Trouble with the new FLHXS

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Old Sep 23, 2013 | 08:14 PM
  #1  
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Default Trouble with the new FLHXS

Came home Friday and my new decatted header was sitting on the front porch. Saturday morning was rainy so I decided to go out to the garage and swap the headers out. Had to run to town for new gaskets, but the swap went pretty smooth. REALLY woke up the stock pipes. Was raining so no test ride. Sunday was a beautiful day, but had to go watch my Panthers whoop up on some NY football Giants. Got home late so no ride.

Went out this morning and first thing I notice is the sound. Love it so far and the new slipons can wait a while. Next thing is a rattle in the right side of the fairing, which I can stop by gripping the fairing at the vent.

The next thing was a misfire by the motor, like it lost power for a second. Then it backfired and kinda spit back through the intake. Only did that once. All of this at either cruising part throttle or transition rolling off throttle. When I'm cruising I notice that I sometimes seem to be slowing down. When I apply throttle it seems to take a bit of travel to get any response and then I get a handful. And every once in a while it misfires and snatches the compensator.

No problem with on throttle acceleration. Only at throttle transition roll off and cruise, or part throttle. It idles fine, and that cam sounds real good.

I figure it's probably the TPS. I checked for exhaust leaks and didn't see anything. I'll take it in tomorrow to see what the dealer says.
 
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Old Sep 23, 2013 | 08:24 PM
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You need a tuner, your headers are lot more free flowing and are causing lean spots in your current fuel mapping.
 
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Old Sep 23, 2013 | 08:28 PM
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Originally Posted by kojak
You need a tuner, your headers are lot more free flowing and are causing lean spots in your current fuel mapping.

Yep, THAT ^^^
 
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Old Sep 23, 2013 | 08:33 PM
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Same thing with my 2013...... No different, put on cobra speedsters..... Then it ran like doo doo until I put on a fuel pak and a stage 1 air kit, runs like a scalded dog!
 
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Old Sep 23, 2013 | 08:36 PM
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Put an Xied on mine after a decatted header swap and it seemed to clear things up. I'm sure a tuner would be better, but the Xied worked for me.
 
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Old Sep 23, 2013 | 08:38 PM
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the tune is off now that the pipes are changed. Nothing wrong with the bike just the tune,,,,,,, Dealer can dyno tune or you can purchase a simple tuner to get rid of that easy.. good luck with it.
 
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Old Sep 23, 2013 | 09:10 PM
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His bike is a '14. I don't think there are tuners for them yet. There is a Stage 1 download available at the dealer, however.
 
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Old Sep 24, 2013 | 04:47 AM
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The SE V tuner works for 2014.
 
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Old Sep 24, 2013 | 05:03 AM
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Have a power vision. Waiting on Fuel Moto and Dynajet.
 
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Old Sep 24, 2013 | 05:34 AM
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O2s back in the same positions?

Checked for exhaust leaks at the exhaust ports?

Stock pipes are pretty restrictive still. Had plenty of friends cut out the cat and never remapped. Just wondering...

lp
 
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