So I was changing my spark plugs and found that one of my ignition coils is full of soot and the rubber washer at the base is ripped. My question is what causes the soot in the chamber where the ignition coil is? And also I wanted to know if since the rubber washer is ripped would I have to buy a new ignition coil? It makes a tapping noise now I'm guessing since the washers ripped maybe? Would I have to buy a full set or would it be okay to just buy one? Thanks!
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