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Originally Posted by theFREAKnasty82
what color was it? If it's white, it could mean that it's the incorrect heat range for that particular spark plug, thus allowing it to get too hot.
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It was white/silver in color. But if it's the wrong heat range, why did it suddenly start to happen? I checked the plugs about 2 months ago, and they were fine then.
The replacement plugs are the ones specified in the Haynes manual.
Could it be possibly be stuck valves? Strange though that it happens on 2 cylinders.