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fouled spark plug

  1. T

    need help with many things, fouled sparks, high rpms, low voltage, low gas milage

    ok where to start.... i have a 91 explorer eb version 4 l v6 here are my problems my spark plugs get fouled shortly after i replace them, some of them have what looks like caked on oil with what looks like little pieces of black stuff on them...and the plug thats farthest back on the...
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