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atlantiskiwi

What a spark plug says?

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Cleaning the m3 plugs this arvo and was curious how you would read mine?

Lean, rich? Ok?

They all were much the same abd cleaned up really well. But I noticed the gap was sitting at .6 when it should be .8. How much of a major is this? I tried re-gaping but the nodes were to soft.

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They look pretty normal to me. If anything - looks a tiny bit darker than normal. Could possibly be running a bit rich, but i'm no expert.

Just curious, how did you clean them??

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They look perfect. No erosion on anode or cathodes and are a nice matte gray.

When the soot up is usually oil accumulation in the intake from hot oil / vapor or loose plugs.

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All good!

For 200k I thought they looked pretty good too.

Very soft wire brush (brass) and small amount of brake clean! - See pic of it after clean up.

I also cleaned out the intake box, air filter and MAF sensor at the same time. Those things combined took a few hours and did make a slight difference! Either way, very satisfying and good maintenance.

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