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Pulling out spark plugs can be a relative pain--especially on a Fourth Gen F-car like ours--but it's a necessary part of making sure an engine is running healthy. It's important to remove and inspect the spark plugs after some miles have been accumulated on a new motor, as they can be an excellent indicator of engine health. For example, an overly black or sooty plug can indicate an overly rich condition or a problem with your ignition system. Also, abnormal plug deposits or discoloration can be indicative of contact with coolant and a head gasket problem. View Related Article
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