Can Spark Plugs Cause Engine Vibration?
2 Answers
Damaged or malfunctioning spark plugs can cause engine vibration, so it is necessary to inspect and replace them promptly. Steps for replacing spark plugs: Open the engine hood, lift the plastic cover of the engine, remove the high-voltage ignition wires, and mark the position of each cylinder to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any external debris such as 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 high-voltage ignition wires in the firing order and secure the cover. Spark plug replacement intervals: Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is advisable to follow the owner's manual. The following standards can be used as a reference for maintenance replacement: Platinum spark plugs should be replaced at 40,000 kilometers, standard nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers.
I just encountered an engine shaking issue a few days ago, and it turned out to be caused by the spark plugs. My car was jerking and lacked power during acceleration, making me think it was a major problem. After taking it to the repair shop, the mechanic said the spark plugs were old and carbon-fouled, causing intermittent misfires. When some cylinders failed to ignite, the engine became unbalanced and started shaking. After replacing the spark plugs, the engine immediately ran smoothly again. Spark plugs are the core components of the ignition system, with a typical lifespan of around 50,000 kilometers. Delaying replacement can easily lead to this issue. Shaking can also be caused by faulty ignition coils or fuel system blockages, but spark plugs are a common and often overlooked culprit. It's recommended to inspect and maintain them regularly—don't wait until the shaking becomes severe, as it affects both safety and driving experience.
