What Color Indicates a Good Running Spark Plug?

Discover what colors in spark plugs signify optimal engine performance. Learn how to identify engine health with spark plug colors.

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A good running spark plug is typically light tan or grayish in color. This indicates the engine is running properly and the air-fuel mixture is correct. If the spark plug is black or oily, it might indicate an issue that needs attention.

FAQs & Answers

  1. What does a black spark plug indicate? A black spark plug usually indicates that the engine is running too rich, which means there is too much fuel and not enough air.
  2. How often should spark plugs be replaced? It's recommended to replace spark plugs every 30,000 to 100,000 miles, depending on the type and manufacturer's recommendations.
  3. Can I clean spark plugs? Yes, some spark plugs can be cleaned, but it's often recommended to replace them for optimal performance.

Watch More

For more insights on engine performance and maintenance tips, explore our videos on spark plug care and troubleshooting engine issues. Your vehicle's health matters!

  1. Understanding Healthy Spark Plug Colors: A Guide Learn what a healthy spark plug looks like and how to identify engine issues through spark plug color. Keep your vehicle running efficiently!