What faults will occur if the spark plug is broken?

[LeKevin]

Symptoms of a damaged spark plug: The car may experience difficulties in starting, low power, excessive exhaust emissions, increased fuel consumption, and other faults. Methods to determine if the spark plug is damaged: Remove the spark plug and observe its appearance color to judge its condition. A normal spark plug has an insulator skirt and electrodes that appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a reddish-brown insulator skirt, an electrode gap between 0.8-0.9mm, and no signs of electrode burning. If the spark plug is covered with oil or deposits but is not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged, with signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plug with a new one. Additionally, if the spark plug appears black as if smoked, it indicates that the wrong heat range was selected or the mixture is too rich, and oil is leaking into the combustion chamber.