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No Fire on Cyclinder 1

Discussion in 'XJ Technical Chat' started by fixinggenie, Oct 8, 2011.

  1. fixinggenie

    fixinggenie New Member

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    1982 Yamaha Seca XJ 650

    I cleaned the carbs, synced the card, checked the plugs for spark, checked with spark tester, yet I get no fire from cylinder 1. The others are all firing fine.

    bowl has fuel.... I am reaching my last resort of taking out the carbs again and doing a warm lemon wash with EVERYTHING.

    If I remove the spark cable, no difference in idle.

    Any thoughts?

    Compression Test was also good.
     
    fixinggenie, Oct 8, 2011
    #1
  2. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    Is the plug wet or dry when you pull it out? Have you checked for a vacuum leak with propane? Have you tried carb cleaner down the vacuum port?
    If the Idle/ Low speed circiut in the carb is plugged it may miss until the RPM's are up high enough for the main jet to come into play. Did you try pulling the plug wire at RPM over 2000?
     
    MN-Maxims, Oct 8, 2011
    #2

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