Engine running on one cylinder?

Discussion in 'Touring Models' started by gzrglyde, Aug 20, 2011.

  1. gzrglyde

    gzrglyde Member

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    Have an S&S 96 inch motor. Replaced coil and plug wires recently, and also discovered the VOES was bad. All replaced, and ran strong...for about an hour. As I am riding, suddenly it starts running real rough. I pull overand the front plug wire had popped off (never had that happen before!). Figuredd that was it, so I put it back on tight, started the bike, and it ran the same...like only one cylinder was firing. Got it home, checked all wires, etc...everything looks fine. Front plug (these were new) is gas fouled, and rear looks perfect. Any ideas?
     
  2. glider

    glider Veteran Member

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    Swap the plugs and see what that does, could be a defective plug. Otherwise check the compression.
     
  3. gzrglyde

    gzrglyde Member

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    Will try that...
     
  4. gzrglyde

    gzrglyde Member

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    Well that didn't work. Put in a new plug, same thing...front cylinder not firing...
     
  5. glider

    glider Veteran Member

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    Check compression and then move on to the coil to see if that section of the coil is working.
     
  6. gzrglyde

    gzrglyde Member

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    Changed out the new plug wire on the front cylinder...runs a little better, it seems...but ehaust is still cold coming out of pipe. I am not going to be happy if it is the coil...brand new Accel coil.
     
  7. gzrglyde

    gzrglyde Member

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    Trying to figure out how to test the coil....I have an Accel single fire coil. Has two negative (-) terminals one positive terminal in the middle (+) and then the two terminals for the plug wires. I have an ohmeter...can you tell me how to test the coil? Appreciate the help greatly!
     
  8. glider

    glider Veteran Member

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    It's all in the self help forum for the looking and it's all categorized for easy searching.

    Harley Davidson Community

    You may want to try switching the plug wires in the coil and see what that does.
     
  9. gzrglyde

    gzrglyde Member

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    Thanx! Got the coil checked...okay, swapped plugs and wires...no change. Local shop says they think it is ignition...I'm taking it in, tired of trying to troubleshoot this and taking the gase tank on and off to get at the coil and wires. Like to shoot the engineers who designed this...almost as bad as fighter aircraft engineers...
     
    Last edited by a moderator: Aug 20, 2011
  10. Jack Klarich

    Jack Klarich Expert Member

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    What Ignition system are you running? I have seen many problems with Dyna pick ups going bad, They are not too hard to trouble shoot, you can find PDF files on most ignition web sites for trouble shooting, Good Luck and let us know, Also Agree with Glider on a compression test maybe a blown Head Gasket?