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Igniton coil problems.

Discussion in 'XJ Technical Chat' started by buyerz78, Feb 11, 2016.

  1. buyerz78

    buyerz78 New Member

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    Having carbureator problems, trying to narrow down my problems so I've decided to check over my igniton system to make sure thats out of the equation. The bike runs good while driving, just problems starting and idling.

    So I started checking things over with my multimeter.

    -Pick up coil ohms out good
    -tore apart all the plug caps, corroded, I need new ones but still work.
    #1+4 coil Primary side - 2.5ohms Good
    #2+3 coil Primary side - 2.5 ohms Good

    #1+4 coil Secondary side 11k ohms Good

    #2+3 coil Secondary side is an open circuit.

    Im checking it at the wires without the plug caps. Thought it was my meter but it's not.
    I trimmed the wires back a and made damn sure I was touching copper! Nothing.

    So I poked into the wire up at the coil (yes I know its a no-no) and measured the resistance of the wires.
    They had about .02 ohms of resistance
    . Then measured across the coil and still completely open. Checked it 20 times. The other coil is still 11k.

    That leads me the conculusion that it's just a bad coil right?
    Now the thing that confuses me is that the bike started up and ran on all 4 cylinders up until I took the tank off and checked these wires. Just to be extra sure I put the cap back on with a spark plug grounded to the block and it still defiently makes a spark. It looks a little weaker than the other coil but It may be because of the plug caps.

    Took the cap off and measured the resistance again and nothing! Still 11k at the other coil

    So am I missing something here, how can this coil have infinite resistance(open circut) when I check it with my meter, but make pretty blue sparks too?
     
  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    could be you have a break in the plug wire closer to the coil. and the voltage arcs the gap
    so considering the coil is bad cut back the wire about 3 inches from coil and ohm them if good then you can replace the plug wires with a splice or dig the wire out at the coil and replace it I think there is a thread on how to do that
    upload_2016-2-11_23-16-26.jpeg advanced auto parts or ebay just under 10 each there is also a solder or crimp type

    of course for the cost of wires and splice you could probally pick up a coilpak on fleabay

    sorry . I miss read the part on "So I poked into the wire up at the coil"
    ignore what I posted
     
    Last edited: Feb 11, 2016
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Yes.

    Sparks OK at atmospheric pressure ≠ sparks under compression. There is probably a spot in the secondary coil where the current can jump the gap and make a weak spark. A meter will show it as an open circuit.
     
    XJ550H likes this.
  4. Rooster53

    Rooster53 Well-Known Member Premium Member

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    And just to be sure, if using a DMM it is being switched to a higher setting (>20K) when checking 2 and 3? Just curious if you really have an open as suggested that is being bridged by the high voltage.
     
  5. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    How did you make that "not equal to" symbol???
     
  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Press the alternate key and the = key.
     
  7. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    At the same time? Does not seem to work......
     
  8. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Hold ALT then press =. You might need to use a different key combination since I'll wager you are using one of those Window-machines. You might have to actually type the unicode identifier for the character: hold ALT, then type 2260. That won't work in every program however, because...lack of enforceable development standards. I'm sure that someone has made a plug-in or extension to let you easily use key combinations like the well-thought-out computers do ;)

    ≤≠≥
     
  9. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    ALT and 2260 = ╘
     
  10. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Try ALT 8800. That's the decimal value for ≠
     
  11. schmuckaholic

    schmuckaholic Well-Known Member

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    I think it's a browser issue - Alt-8800 spits out the backwards apostrophe normally located under the tilde, at least on this version of Firefox. Wordpad? No problem. Also should mention to Len that it's not ASCII, but UTF-8.

    https://www.google.com/search?q=UTF-8
     
  12. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    (ALT)8800 = ``
    (ALT)-8800 = `
     
  13. boomerangg22

    boomerangg22 Member

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    this works LOL notequal.jpg
     
  14. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Like I said earlier...lack of enforceable development standards. The flexibility that allows is a double-edged sword.
     
  15. Nuch

    Nuch Well-Known Member

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    Hitting [option key] = gives you ≠ on my iMac... Man this thread went in an entirely different direction... Love this place!
     
  16. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    You know, you're right. I fogot that the ALT key is shift + option. My fat fingers cover up the lower part of that key.
    Still, the previous comments are all accurate as far as Windows machines go.
     

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