Quote:
Originally Posted by radroach
How many miles on the old plugs?
Aren't the brown marks up the middle of the plug from the coil packs grounding and burning it? Thinking you might need new coils soon.
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175,000km... they needed a change. the coil pack looked to be in fine shape honestly, wish i snapped a pic. even when i was measuring them for depth they looked really good on the inside.
i think the discoloration you are referring to is corona stain.. but maybe someone more educated on the matter can chime in