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What is your question?
Engine missing out and making a poping sound under throttle. Have cleaned spark plugs....one was black as though it had not been firing. Do I have a valve problem or outher?
1 Reply
There are several things that need to be checked to determine what the problem is. If one plug is black, I would focus on that cylinder and make sure it is mechanically OK. Also check the spark to the spark plug in that cylinder.