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What Are the Benefits of Replacing Spark Plugs?

1 Answers

SanDelaney

07/29/25 5:13pm

Replacing spark plugs ensures stronger ignition, promoting more complete combustion of the air-fuel mixture, thereby improving fuel efficiency. When the mixture burns completely, the engine operates more efficiently, and exhaust emission indicators improve. The function of a spark plug is to release the high-voltage current converted by the ignition coil between the center electrode and the side electrode, igniting the combustible air-fuel mixture in the engine combustion chamber and maintaining normal engine operation. This means spark plugs must endure extremely high pressure and temperature. Over time, carbon deposits can accumulate, affecting electrode discharge and ultimately harming engine performance. Spark plugs do not necessarily need to be replaced strictly according to the manufacturer's recommended schedule. The actual replacement time can be determined based on the condition of the spark plugs. If a spark plug is nearing the end of its life, the following symptoms may appear: 1. Noticeable engine vibration and frequent stalling; 2. Increased fuel consumption and reduced power; 3. Strong gasoline odor in exhaust emissions, accompanied by black smoke from the tailpipe. During inspection, if any of the following conditions are observed, it indicates that the spark plugs need replacement: 1. Heavy carbon deposits around the spark plug electrodes; 2. Electrode deformation; 3. Signs of burning or scorching on the white ceramic insulator. Generally, spark plugs are not very expensive. Prompt replacement helps enhance engine efficiency and reduce fuel consumption, making it a highly cost-effective maintenance measure overall.

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