Spark Plugs: How do I know when to change them

Common signs of faulty spark plugs include slow acceleration, loss of power, poor fuel economy, engine misfires, and difficulty starting the car. Without a spark, there would be no way for fuel to ignite in the combustion chamber. Spark plugs have been a critical component of the internal combustion engine for years.

Spark plugs are designed to transmit an electrical signal sent from the ignition coil at a predetermined time to create a spark that ignites the air-fuel mixture inside the combustion chamber.

Each vehicle requires a particular type of spark plug made from specific materials and with a designated spark plug gap that is set by a mechanic during installation. Good spark plugs will burn fuel efficiently, while bad or failing spark plugs can cause the car not to start at all.

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