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2003 FXDWG only one cylinder is firing

No power. Sounds like 650 Honda! Rear cylinder dose not even get warn after its running for a min. or so. Like its not even firing. Only about 3 hrs on 2nd set of new plugs. Haven't changed wires yet. Removed rear plug and checked and it has spark but not sure if its too weak or not, but there was a spark. Harley shop mechanic said it's probably a bad intake gasket. I sprayed either around intake gasket at jug to check for leak and no change at all in RPM. so I assume no leak, not sure. Not sure if coil can be tested to see if its going bad. I would like to eliminate all options of parts that i can repair or replace before handing it over to a mechanic and paying double for a minor fix. Any suggestions of where to go next would be greatly appreciated. Thank you

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: NO REAR SPARK

I had almost the same thing happen on my 03 sportster it was the ignition modual dont know what year yours is but 03s are bad about messing up harley said they fixed the problem on the replacements

Posted on Sep 02, 2008

  • 1 Answer

SOURCE: Rear cylinder not firing

95 Evo, new plugs, new wires, started backfireing like a machine gun, front cyl. no spark at plug sometimes - would this be the coil, have not ohmed the coil yet . Thanks

Posted on May 13, 2009

v2iper
  • 150 Answers

SOURCE: 1999 Fatboy backfiring & no spark

The guy with the same problem..Your leaving your enrichner (choke) out thats where the 2000rpm and soot comes from...Original fellow I think you may have an intake leak around your manifold or carb.

Posted on Jun 14, 2009

wd4ity
  • 4565 Answers

SOURCE: no fire at the plugs, battery fine, was running

Your Sporty has a fuse box somewhere. check the fuses to see if any are blown. Harley always puts their ignition systems on their own circuit. If you don't find anything that way, contact me directly at wd4ity@bellsouth.net and I'll scan a trouble shooting chart in and send it to you. There's more to the late models than there was with the early models.

Posted on Apr 21, 2010

  • 11800 Answers

SOURCE: i was riding up hill

The ignition is generated simultaneously in both cylinders: if you get it to a cylinder it means that the coil and the electronics pack is operational = the defect is located after them.
So replace the sparkplug - it might be shorted. If you still don't get spark then the spark wire for the rear one is interrupted - replace it.

Posted on Apr 03, 2011

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