What are the reasons for replacing spark plugs?

[LeilaRose]

The reasons for replacing spark plugs are: Spark plugs have a service life, and prolonged use can lead to carbon buildup. If not replaced regularly, the engine may experience difficulties starting, insufficient power, increased fuel consumption, and excessive exhaust emissions. The function of spark plugs in a car is to ignite the air-fuel mixture, enabling the engine to start and operate. Their importance is comparable to the heart of the engine. If the owner notices increased fuel consumption after replacing the spark plugs, it is because modern engines use computer control to manage fuel injection and ignition. The engine control unit (ECU) adapts to the working condition of the old spark plugs, so after installing new spark plugs, the ECU will adjust accordingly based on the new spark plugs.