What Are the Symptoms of Bad Spark Plugs? Common Signs to Watch For

Learn the key symptoms of bad spark plugs and how they affect your vehicle's performance. Discover the signs to look out for!

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Symptoms of bad spark plugs include engine misfires, poor fuel economy, difficulty starting, and lack of acceleration. Additionally, you might notice the engine running rough at idle or a check engine light. Replacing faulty spark plugs can improve engine performance and fuel efficiency.

FAQs & Answers

  1. What causes spark plugs to fail? Spark plugs can fail due to carbon buildup, overheating, or wear over time, impacting engine performance.
  2. How often should spark plugs be replaced? It is generally recommended to replace spark plugs every 30,000 to 100,000 miles, depending on the type.
  3. Can bad spark plugs cause engine damage? Yes, if left unchecked, faulty spark plugs can lead to engine misfires, reduced efficiency, and potential engine damage.
  4. How can I tell if I need to replace my spark plugs? Look for signs like difficulty starting, rough idling, loss of acceleration, or a check engine light.

Watch More

For more insights on improving your vehicle's performance, check out our related videos on engine maintenance and troubleshooting common car problems.

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