Posts Tagged: Spark plug reading guide: How spark plugs fail

Spark plug reading guide: Spark Plug Failures

Using a Spark Plug Reading Guide to Diagnose Spark Plug Failures As a professional technician, diagnosing spark plug failures is one of the most important parts of any comprehensive engine inspection. The spark plug plays a critical role in engine performance by transferring electrical energy across the air gap between the center and ground electrodes, initiating combustion of the air-fuel mixture. When spark plugs fail, they cause a cascade of performance issues that often lead to misfires, poor fuel economy, and hard starts. Let me walk you through the most … Read More