misfiring plug wire

[Deleted User]
[Deleted User]
edited November -1 in HUDSON
#1wire won't fire when it it pushed all the way down in dist. cap. if i pull it out and hold it above cap it fires great. i changed wire and it does the same thing, ck'd cap looks good what can i do to fix this?

Comments

  • [Deleted User]
    [Deleted User]
    Try changing spark plug.I have had bad plugs act that way.Why?I do not know but thay will sometimes.
  • Geoff
    Geoff Senior Contributor
    Holding the wire away from the cap means the voltage has to increase to jump across, hence if you have a bad plug (dirty, oiled up, or too wide a gap) this increased voltage causes it to fire. There used to be a proprietary gadget, back in the twenties, called a "spark intensifier" which was primarily intended to overcome misfiring problems caused by oiled up or dirty plugs. It was basically an adjustable gap in the output wire of the coil, causing this voltage build-up. Only problem is that it will inevitably lead to to coil failure, as the insulation breaks down with the excessive voltage.
  • [Deleted User]
    [Deleted User]
    the plugs are fairly new,not oil fouled,but iwill ck. gap. if gap is ok,would just replacing plug cure prob.?
  • [Deleted User]
    [Deleted User]
    Sometimes a plug can look good,and still be bad.(conductor inside insulater broken ect.) try trading plugs with anouther cly.and see if the mis moves with the plug or stayes where it is.
  • [Deleted User]
    [Deleted User]
    I think I would check the INSIDE of the dist. cap for cracks and/or scratches. Check also for carbon tracking around inside. Especially around number one terminal.
    Bob
  • kamzack
    kamzack Senior Contributor
    Swap plug t another cyclinder. See if there's any change.

    Kim
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