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Thread: Spark Plug Reading

  1. #1
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    Default Spark Plug Reading

    Last edited by SPI_Foci; 03-24-2012 at 06:50 PM.
    JP
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  2. #2
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    Default Re: Spark Plug Reading

    I'm not very good at it but this link should help.

    http://4secondsflat.com/Spark_plug_reading.html



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  3. #3
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    Default Re: Spark Plug Reading

    From the pics it looks like they are burning pretty good, 6 looks a little rich or something. Cant really tell for sure though, pics are a little blurry.
    repair and detailing, amsoil dealer304-677-5804www.sbfilters.com

  4. #4
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    Default Re: Spark Plug Reading

    #6 shows either rich or too cold, maybe misfiring?
    JP
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  5. #5
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    Default Re: Spark Plug Reading

    I was thinking #6 may be misfiring also. Old plugs or relativly new?
    repair and detailing, amsoil dealer304-677-5804www.sbfilters.com

  6. #6
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    Default Re: Spark Plug Reading

    Relatively new, they've been in since the new motor.
    JP
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  7. #7
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    Default Re: Spark Plug Reading

    Did it feel like it was misfiring or breaking up any?
    repair and detailing, amsoil dealer304-677-5804www.sbfilters.com

  8. #8
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    Default Re: Spark Plug Reading

    Quote Originally Posted by rocketman442 View Post
    Did it feel like it was misfiring or breaking up any?
    At times, yes.
    JP
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  9. #9
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    Default Re: Spark Plug Reading

    Well, if I were you id ohm out the plug wires, injectors ect. If you dont find anything there you can also swap components side to side to see if your problem moves. When the problem moves youve found the problem. While ya have the plugs out it would be a great time for a compression test.
    repair and detailing, amsoil dealer304-677-5804www.sbfilters.com

  10. #10
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    Default Re: Spark Plug Reading

    Compression test results:


    1-195
    2-192
    3-180
    4-185
    5-190
    6-140
    7-150
    8-192


    Test was cold and dry, but enough to tell me it's got problems.


    I need to get a 12 point socket to turn the crank for a leak down test to diagnose further.
    JP
    Bigger, Stronger, Faster...

  11. #11
    Join Date
    Dec 2006
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    Default Re: Spark Plug Reading

    Oh that sucks.
    repair and detailing, amsoil dealer304-677-5804www.sbfilters.com

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