What are the effects of not replacing spark plugs for a long time?

[DeHadley]

The consequences of not replacing car spark plugs for a long time include: 1. Difficulty in ignition, prone to stalling, insufficient power, weak acceleration, increased carbon deposit formation, manifested as lack of vehicle strength, slow acceleration when stepping on the throttle, and a missing gear in power; 2. Misfire causing cylinder inactivity (cylinder misfire), manifested as engine shaking, engine warning light turning on, and intermittent exhaust pipe sound with sputtering noises upon careful listening; 3. Incomplete combustion leading to failure to meet exhaust emission standards, causing environmental pollution. What are the effects of damaged spark plugs: If spark plugs are damaged, it can directly cause issues such as leakage in the vehicle's ignition system, increased fuel consumption, and reduced power. The most significant problem is difficulty in ignition, affecting the normal use of the vehicle. Severe spark plug erosion, with the top of the spark plug showing scarring, damage, or melted and eroded electrodes, indicates that the spark plug is destroyed and should be replaced.