Is Idle Shaking Caused by Spark Plugs?

[JoelDella]

Vehicle idle shaking is related to spark plugs. Damaged or malfunctioning spark plugs can cause engine misfiring, abnormal shaking, and unusual noises. Spark plugs are crucial components of a gasoline engine's ignition system, as they introduce high-voltage electricity into the combustion chamber and create a spark by jumping the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. Difficulty Starting: Excessive carbon buildup on spark plugs or too much sediment accumulation can increase the spark plug gap, leading to insufficient ignition energy and making it difficult to start the car. Reduced Power: Thick carbon deposits on spark plugs reduce shunt resistance, affecting the spark generation at the electrodes, which results in unstable engine operation and decreased power. Excessive Emissions: Faulty spark plugs can disrupt the normal operation of the ignition system, causing incomplete combustion of the air-fuel mixture and the release of unburned harmful substances. Increased Fuel Consumption: Issues with spark plugs can lead to abnormal ignition system performance, incomplete combustion of the air-fuel mixture, and wasted fuel.