How Many Spark Plugs Should Be Replaced Each Time?
1 Answers
Four spark plugs need to be replaced at a time in a car. Theoretically, even if you replace one spark plug with the same brand and model, the discharge gap and resistance value between the new and old spark plugs will differ. Not replacing all of them may result in issues such as engine shaking, difficulty in acceleration, and increased fuel consumption. Steps for replacing spark plugs: Open the engine hood, lift the plastic cover of the engine, remove the high-voltage distributor 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 plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Reinstall the removed high-voltage distributor wires according to the firing order, then secure the cover. If a spark plug is damaged, it can directly cause issues such as leakage in the vehicle's ignition system, increased fuel consumption, and reduced power. The most critical issue is difficulty in ignition, affecting the vehicle's normal operation. Severe spark plug erosion, such as scarring at the top, electrode melting, or burning, indicates that the spark plug is damaged and should be replaced.
