What faults can occur with spark plugs?

[Lily]

Spark plugs can experience the following faults: 1. Excessive spark plug gap; 2. Spark plug leakage and erosion; 3. Oil accumulation on spark plugs; 4. Black deposits on the electrode; 5. Fractured insulator tip. Spark plugs are crucial components in a gasoline engine's ignition system, introducing high voltage into the combustion chamber to create a spark across the electrode gap, igniting the combustible air-fuel mixture in the cylinder. Types of spark plugs include: 1. Standard spark plugs; 2. Extended tip spark plugs; 3. Electrode spark plugs; 4. Seat-type spark plugs; 5. Single-electrode spark plugs; 6. Surface gap spark plugs; 7. Standard and projected spark plugs; 8. Single-side electrode and multi-side electrode spark plugs; 9. Nickel alloy and copper core electrode spark plugs; 10. Conventional and resistor spark plugs.