What are the symptoms of fake NGK spark plugs?
1 Answers
Fake NGK spark plugs can cause the following adverse reactions in a car: Prone to acceleration jerking, decreased power, increased fuel consumption, poor ignition, engine shaking, weak spark, incomplete combustion, short lifespan leading to cylinder misfire, etc. Methods to determine if a spark plug is damaged: Remove the spark plug and observe its appearance color to assess its condition. A normal spark plug's insulator skirt and electrodes should appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a reddish-brown insulator skirt, with an electrode gap between 0.8-0.9mm and no signs of electrode burn. If the spark plug is contaminated with oil or deposits but not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged, showing signs of blistering at the top, black streaks, cracks, melted electrodes, etc., the cause of the damage should be identified. After troubleshooting, replace the spark plug with a new one. Additionally, if the spark plug appears black as if smoked, it indicates the wrong heat range was selected or the air-fuel mixture is too rich, with oil creeping up.