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your mechanic on Instagram: "The clear explanation of how to read spark plugs based on the conditions shown in your image. Spark plugs act like a window into the engine—showing how well it is burning fuel and if any problems exist. 🚗 How to Read Spark Plugs (Explained) 1. Normal Appearance: Light tan/gray insulator, clean electrode. Meaning: Proper air–fuel mixture, correct heat range, good engine condition. 2. Carbon Fouling Appearance: Dry, black, sooty carbon deposits. Causes: Rich air–fuel
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