rear cylinder not getting gas?????

Discussion in 'Sportster Models' started by hob11, Oct 6, 2010.

  1. hob11

    hob11 New Member

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    1200 sportster not running on both cylinders. Rear doesnt seem to be getting fuel. Checked and replaced vacume lines. New plugs, plug wires, treated fuel in tank. Used carb cleaner and it helped a bit. Plug wire has fire to it. Not sure where to go from here.......Thanks!
     
  2. Jack Klarich

    Jack Klarich Guest

    Any other mods to engine, check compression is intake valve stuck is it back firing
     
  3. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    As both cylinders are fed by the same carb and manifold then it would point to a problem with the rear cylinder but a leak on the rear cylinder/manifold seal may result in a very weak mixture to that cylinder after that i would be doing a compression test

    Brian
     
  4. Hoople

    Hoople Account Removed

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    What symptom(s) is giving you this indication. What makes you think the rear cylinder is not firing.
    You pull the front plug wire and the engine flat out dies?

    As Jack said, a compression test is in order.
     
  5. hob11

    hob11 New Member

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    Thanks guys for responding. Turns out the exhaust valve is stuck open. Not sure yet why, still tearing it down.....
     
  6. Jack Klarich

    Jack Klarich Guest

    Do you have a manual?:D