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Q: Misfire in engine.

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I have a misfire on cylinder 7.

A: A misfire on cylinder 7 could indicate that...

A misfire on cylinder 7 could indicate that you have a problem with your ignition system. I would have a technician perform a tuneup on the car replacing the spark plugs and wires and see if that does not clear up the misfire. Spark plugs should be replaced every 30,000 miles.

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