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93 ZJ Spark Plugs

Discussion in 'Cherokee' started by TinyInkognegroT, Oct 21, 2019.

  1. Oct 21, 2019 at 9:15 AM
    #1
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    What are you guys think about these spark plugs? PHOTO_20191021_095619.jpg PHOTO_20191021_095630.jpg
     
  2. Oct 21, 2019 at 9:18 AM
    #2
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    These are NGK FR4 spark plugs that I bought a couple of months back, around the time that I bought the Jeep and joined this forum, I want to say June or July of this year.
     
  3. Oct 21, 2019 at 9:19 AM
    #3
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    I replaced them with Champion Copper Plus spark plugs because after research, Champion Copper is OEM for ZJ'sPHOTO_20191021_095716.jpg
     
  4. Oct 21, 2019 at 10:00 AM
    #4
    Prerunner1982

    Prerunner1982 Well-Known Member

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    The NGKs didn't look bad.
     
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  5. Oct 21, 2019 at 11:35 AM
    #5
    Jim Beam

    Jim Beam Well-Known Member

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    The Champs are good, although I am an Autolite user. I would suggest keeping the NGKs until the electrodes are worn a bit more, they still have a lot of life left.
     
  6. Oct 21, 2019 at 11:52 AM
    #6
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    I went off of this chart and assumed they looked worn.

    Spark_plug_Outlook_Analysis.jpg
     
  7. Oct 21, 2019 at 12:14 PM
    #7
    Awrench

    Awrench Well-Known Member

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    I would say they are normal maybe a little to the lean - not worn as the ground electrode still has corners not rounded over. No traits that I would call bad.
     
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  8. Oct 21, 2019 at 2:57 PM
    #8
    aggrex

    aggrex Well-Known Member

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    DE
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    I'd say they look normal with some carbon accumulation. Much better than fuel or oil fouled plugs.
     
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