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Hi all,

I was due for an spark plug change, after reading here I went with the Denso ITV22.

Just after installing them my engine sounded a little more agressive, and my mpg went down 1mpg. So I decided to took cyl 3 spark plug out to check it out.

For me it seems like an excess of carbon deposits. pictures are from the same spark plug.

It have been only 260miles. Im at Stage 1 with green filter.
 

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Looks fine to me , always check the gap. Even though they say pre gapped... they never are
 

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It looks fine I think. It is a bit tough to see the annealing point on the strap, but it looks like it is right at the bend which is perfect. It doesn't look like there is any buildup on the strap or the electrode.

Like others said, check the gap. Even if you gapped them to .026", they can and will erode over time and open up the gap, so if you are having issues, check all of the gaps.
 
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