How to fix Honda Civic 2020 model faulty spark plugs
**Faulty spark plugs** can indeed have a significant impact on your vehicle's fuel economy. Let's explore the symptoms of bad spark plugs and how they relate to fuel consumption:
1. **Flashing Check Engine Light**: When spark plugs are faulty, the air-fuel mixture may not combust correctly. As a result, the **Check Engine Light** may start flashing. This warning light can also come on if the spark plug becomes contaminated with oil or overheats. If you notice the flashing light, it's crucial to address the issue promptly.
2. **Misfiring Engine**: A misfiring engine occurs when the ignition system is under stress. Faulty spark plugs can lead to sputtering and a feeling that the engine is struggling to perform. Ignoring engine misfires can cause further damage.
3. **Rough Idle**: Normal idle occurs between 600 and 1,000 RPMs. However, when spark plugs fail, the idle becomes rough. You may feel vibrations as the idle worsens.
4. **Rough Acceleration**: As spark plugs deteriorate, acceleration may become sluggish. The engine might struggle to deliver power smoothly. Keep in mind that other ignition system components could also cause similar issues, so a complete diagnosis is necessary.
5. **Hard-Starting Engine**: Faulty spark plugs can make starting the engine more challenging. If your car takes longer to start, it's time to check the spark plugs.
Remember that worn spark plugs can lead to a **30% decrease in fuel economy**. If you've noticed decreased mileage, inspect your spark plugs and related components for signs of wear²³⁴⁵.