What are the methods to identify a faulty spark plug?

1 Answers
DelCali
07/30/25 12:56am
Methods to identify a faulty spark plug include: 1. Difficulty in starting the vehicle due to insufficient ignition energy; 2. Inspecting the spark plug for cracks, damage, or severe deformation of the electrodes; 3. Thick carbon deposits on the spark plug, which reduce the shunt resistance; 4. Abnormalities in the ignition system leading to incomplete combustion of the air-fuel mixture. The working principle of a spark plug involves the repeated and continuous generation of electrical pulses by the electrode, creating a high-voltage pulse that ionizes the air between the two electrodes, forming a spark and igniting the air-fuel mixture in the cylinder, thereby initiating engine rotation. The functions of a spark plug are: 1. To enhance engine performance by ensuring complete combustion of fuel; 2. To improve the overall operational performance and efficiency of the vehicle.
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