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I was thinking it might be unusual electrodes were wearing on one side only and the slight glazing gave me concern engine might be running hot/lean.


My NGKs on 10k motor also wore on one side of the electrodes.

Your plugs look much better than mine after the same mileage:
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[color:"darkgreen"]1986 4Runner - 4" IFS - 63" Chevys - 33" ATs - 5.29s - Rear Detroit
Sliders - Kayline - Rebuilt 22RE - On Board Air AND Factory AC
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