How many spark plugs does a car need to replace?
1 Answers
Generally, a car needs to replace 4 spark plugs at a time. Theoretically, even if you replace just one spark plug with the same brand and model, the discharge gap and resistance of the new and old spark plugs will differ. Not replacing all of them can lead to issues such as engine shaking, difficulty in acceleration, and increased fuel consumption. Steps for replacing spark plugs: Open the engine hood, lift the plastic engine cover, remove the high-voltage ignition wires, and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any external debris like leaves or dust and ensure they are thoroughly cleaned. Place the new spark plugs into the spark plug holes, hand-tighten them a few turns, and then use the socket to tighten them further. Reinstall the high-voltage ignition wires in the correct firing order and secure the cover back in place. If a spark plug is damaged, it can directly cause issues like leakage in the vehicle's ignition system, increased fuel consumption, reduced power, and most notably, difficulty in starting the engine, affecting the vehicle's normal operation. Severe erosion of the spark plug, such as scarring at the top, damage, or melted electrodes, indicates that the spark plug is damaged and should be replaced.
