Worn spark plugs for your amusement

hardtailpan

TJ Enthusiast
Joined
Jul 15, 2020
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644
Location
Northeast USA
Some of you probably saw my broken plug, well here it is in all its glory with the rest of em'. Waddya think, been in there for 100k+ miles? The gap is better than .090. Crazy as it is the jeep was running pretty well.

plugs.jpg
 
Looks familiar, I pulled these out of mine shortly after I bought it. 200K miles no idea when they were last changed. Oddly I thought it ran fine!
IMG_4624.jpeg
 
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What year is your Jeep OP? Coil-on-plug systems can get rowdy on spark plugs. On my old 4.7 WJ I replaced the plugs shortly after buying it at 100k and there was literally no electrode left sticking up on any of the plugs and it ran fine enough to not notice beforehand.
 
What year is your Jeep OP? Coil-on-plug systems can get rowdy on spark plugs. On my old 4.7 WJ I replaced the plugs shortly after buying it at 100k and there was literally no electrode left sticking up on any of the plugs and it ran fine enough to not notice beforehand.

Yup, it's a 2004, coil on plug system ok!