houstonpv

If you know your spark plugs, please share your knowledge.

Here are pics of my previous plugs. Please identify signs of running Lean or detonation. Basically, for myself and anyone else who is unaware of what to look for.

Hopefully plenty of users will find this helpful.








Thanks

AFs2k

Jeez Paul, I can see a piece of dust on #3...

houstonpv

lol. Thanks... Thats just from the micro-fiber towel I used to lay them on. Glad you could help!

dammitjim

FWIW

http://www.dansmc.com/spark_plugs/sp...s_catalog.html

http://www.ngksparkplugs.com/tech_support/...aqs/faqread.asp

AFs2k

I thought I typed some more to that post... oh well.

What I thought I typed was that they look normal to me. The only one that I think has had a little bit of a "heat stroke" is #4 just because the edge around the electrode looks to be flaking off. And the gap on #1 looks to be shorter than the rest, but that may just be the angle of the pic...

turbo_slug

Use an ohm meter to measure the resistance of the center electrode... The s2k uses resistor plugs

CoralDoc

They look a little cold/rich to me. My center electrode is always much lighter in color than the ones in your pictures. My car runs stock plugs on a stock engine.

INTJ

Lean gives a super white, "bright" look in my experience. If you like in Alberta the cold fuel dump could make it look like that in the right heat range, but otherwise unless you are doing super short cold engine drives those are colder than optimum.

houstonpv

Thats the idea I was getting... So I should NOT get plugs that are a step colder?

Im thinking that these plugs are not getting hot enough to reach their 'self-cleaning' temperature... Which is cause for the carbon build-up, or carbon fouling to be technical.

Thanks