Does this spark plug look bad? - Jeep Patriot Forums
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post #1 of 8 (permalink) Old 07-21-2016, 11:00 AM Thread Starter
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Does this spark plug look bad?

I am changing my plugs again because of stuttering I'm my 2012 with cvt. Last time changing the plugs fixed the issue. When i pulled these they don't look bad to me but what does everyone else think?


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post #2 of 8 (permalink) Old 07-21-2016, 11:46 AM
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I am changing my plugs again because of stuttering I'm my 2012 with cvt. Last time changing the plugs fixed the issue. When i pulled these they don't look bad to me but what does everyone else think?


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If I'm going to remove spark plugs to look at them, I'm going to replace them cause they are pretty cheap.

I would replace them.
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post #3 of 8 (permalink) Old 07-21-2016, 12:50 PM Thread Starter
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If I'm going to remove spark plugs to look at them, I'm going to replace them cause they are pretty cheap.



I would replace them.


I did replace all 4 just because of how cheap and easy a job it is. I'm just curious if anyone thought the ones i removed looked bad


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post #4 of 8 (permalink) Old 07-21-2016, 01:01 PM
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What kind were they (and what did you replace them with) and how many miles?

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post #5 of 8 (permalink) Old 07-21-2016, 01:08 PM Thread Starter
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What kind were they (and what did you replace them with) and how many miles?


They were ngk zfr5f-11 same as ones i replaced them with. 75k on the jeep but only 23k on those plugs


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post #6 of 8 (permalink) Old 07-21-2016, 01:14 PM
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Nah, used but not bad. Did I bore you with my tire theory? Seems this is a different thread. Plugs are a cheap place to start solving a stutter problem. Ya gotta change them sooner or later; why not now?

For photos of bad spark plugs just use google images. Bad plugs will have the electrode burned away or the gap bridged by crud. There is a whole list of potential problems revealed by what an old plug looks like, but I don't think you have anything to worry about with those.

In the old days it was common to pull the plugs, clean and re-gap them, and then use them for a while longer.
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post #7 of 8 (permalink) Old 07-21-2016, 01:53 PM Thread Starter
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Nah, used but not bad. Did I bore you with my tire theory? Seems this is a different thread. Plugs are a cheap place to start solving a stutter problem. Ya gotta change them sooner or later; why not now?



For photos of bad spark plugs just use google images. Bad plugs will have the electrode burned away or the gap bridged by crud. There is a whole list of potential problems revealed by what an old plug looks like, but I don't think you have anything to worry about with those.



In the old days it was common to pull the plugs, clean and re-gap them, and then use them for a while longer.


The tire theory wasn't boring i just figured plus are cheap and easy. And seemed to have rectified they problem. I dove 70 miles today without issue. But only time will tell.


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post #8 of 8 (permalink) Old 07-21-2016, 09:05 PM
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The tire theory wasn't boring i just figured plus are cheap and easy. And seemed to have rectified they problem. I dove 70 miles today without issue. But only time will tell.


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That's the cheapest solution. Hope it works for you. Surprising the plugs were the problem with such low mileage on them. I think you said around 20,000?
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