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Is there a significant relationship between spark plugs and fuel consumption?

1 Answers

DeBrody

07/30/25 7:27am

Spark plugs are related to fuel consumption. If a spark plug is damaged, it can directly lead to increased fuel consumption in the vehicle. Methods to determine if a spark plug is damaged: Remove the spark plug and observe its appearance. The condition of the spark plug can be judged based on the following color observations. A normal spark plug will have an insulator skirt and electrodes that appear gray-white, gray-yellow, or light brown. A properly functioning spark plug will have a reddish-brown insulator skirt, with an electrode gap between 0.8-0.9mm and no signs of electrode burn. If the spark plug has oil stains 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, showing 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 that the air-fuel mixture is too rich, with oil creeping up. Steps to replace a spark plug: Open the hood and lift the engine's plastic cover. Remove the high-voltage ignition wires, marking each cylinder's position to avoid confusion. Use a spark plug socket to remove each spark plug one by one. While removing them, check for any external debris like leaves or dust and ensure everything is cleaned thoroughly. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Reinstall the high-voltage ignition wires in the correct firing order, then snap the cover back into place.

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