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  1. P

    1969 FJ40 Idles High and Misfires

    The fast idle seems strange. It has to be getting air somehow? It should die or at least idle slow when both butterfly's are fully closed. Brake booster leak? PCV valve problem? Butterfly shafts really badly worn?
  2. P

    1969 FJ40 Idles High and Misfires

    A missfire at idle is more likely to be caused by too far advanced. You could try and retard it a bit too.
  3. P

    1969 FJ40 Idles High and Misfires

    Sometimes the butterfly's don't close fully. You can try pushing the linkage towards closed with your fingers to see if it slows the idle.
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