How to read plugs...

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Jul 27, 2003 | 03:01 PM

J Wikoff

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How to read plugs...

How do I read spark plugs? I just put in some Autolite 5245'*. My iridiums I took out were sooty around the edge, with a definate line where the outer electrode meets the edge, then they were yellowish/pinkish on both electrodes and the ceramic at the base of the center 'trode was yellowed. A couple had some yellowish "crust" around the edges with the sootiness.

Jul 27, 2003 | 05:08 PM

Guest

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go to this link, it has pics and decriptions of plugs and conditions/
hope this helps
http://www.hioutput.com/tech/plug.html

Jul 27, 2003 | 07:07 PM

karfreek

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From: Brewerton NY

I replaced my stock NGKs in my 99 SSEi over the weekend, they looked great. I replaced them with the AC branded NGKs. Part number 41-101 of any one needs it.

I also replaced the stock 41-921'* in my dads 96 Ultra this weekend. They also looked normal, great to see both 3800 */C'* are running great!

Jay

Jul 28, 2003 | 02:52 AM

J Wikoff

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By that chart, I would have to go with normal. Good...

Jul 28, 2003 | 06:53 AM

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with you description and not seeing the plugs, it sounded normal to me too. i hope the chart helped. i have it added to my favs.
i make sure i pull a plug after every pass just to see whats going on in there