Novak Conversions Jeep Wrangler TJ engine mounts

What can you tell about my engine based on these spark plugs?

Cumsterdump

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Oct 30, 2025
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Arizona
i’m no savant when it comes to reading the wear or condition of plugs so i am asking for y’all’s input. swapping plugs did fix a misfire code for cyl 2. engine has 65k miles. for those who know how to examine old plugs is there anything you can tell from these about how my engines been running? they are in order top to bottom 1-6 if there’s anything specific to note on one

IMG_6511.jpeg
 
Judging from the condition of the electrodes they should have been replaced long ago.
I can't speak to the color so much, perhaps someone could chime in?
 
i’m no savant when it comes to reading the wear or condition of plugs so i am asking for y’all’s input. swapping plugs did fix a misfire code for cyl 2. engine has 65k miles. for those who know how to examine old plugs is there anything you can tell from these about how my engines been running? they are in order top to bottom 1-6 if there’s anything specific to note on one

View attachment 653479

WTH is a cumster dump?
 
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They all look very normal other than the erosion on the electrode on 3,5,6 indicates that they should have been changed earlier. cyl 2 looks like the best of the lot. The plugs probably were not the source of the misfire. Perhaps the coil pack requires replacement.

It looks like there is oil on the back side of the threads though. Do you have a valve cover gasket leak or the valve cover off?
 
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They all look very normal other than the erosion on the electrode on 3,5,6 indicates that they should have been changed earlier. cyl 2 looks like the best of the lot. The plugs probably were not the source of the misfire. Perhaps the coil pack requires replacement.

It looks like there is oil on the back side of the threads though. Do you have a valve cover gasket leak or the valve cover off?

i do have a VC leak correct. one thing at a time😅
 
i’m no savant when it comes to reading the wear or condition of plugs so i am asking for y’all’s input. swapping plugs did fix a misfire code for cyl 2. engine has 65k miles. for those who know how to examine old plugs is there anything you can tell from these about how my engines been running? they are in order top to bottom 1-6 if there’s anything specific to note on one

View attachment 653479

I can tell It’s a 6 cylinder. I counted ‘em.
 
i’m no savant when it comes to reading the wear or condition of plugs so i am asking for y’all’s input. swapping plugs did fix a misfire code for cyl 2. engine has 65k miles. for those who know how to examine old plugs is there anything you can tell from these about how my engines been running? they are in order top to bottom 1-6 if there’s anything specific to note on one

1762432650937.png
 
Novak Conversions Jeep Wrangler TJ engine mounts