What are the reasons for all 4 spark plugs not firing?
1 Answers
The reasons for all 4 spark plugs not firing include electrode damage, too low insulation resistance value of spark plugs, and improper gap adjustment between spark plugs. Electrode damage: Prolonged electrical erosion from sparks or chemical corrosion from combustion gases can cause spark plug electrodes to break and detach, preventing them from firing. Simply replace the spark plugs promptly. Too low insulation resistance value of spark plugs. This phenomenon weakens the ignition voltage applied to the spark gap, resulting in weak sparks or even complete loss of ignition function. Simply adjust the spark plug resistance value promptly. Improper spark plug gap adjustment: If the gap is too small, it not only limits the contact area between the spark and the air-fuel mixture but also suppresses the growth of the flame kernel due to the "flame quenching" effect of the electrodes. Even if there is sparking, the spark is weak, making it difficult to ignite the mixture. If the gap is too large, the ignition system may not provide sufficient voltage to create a spark between the electrodes. Visit a 4S shop promptly to adjust the gap. Spark plug replacement interval: Under normal maintenance conditions, replace them after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine, so it is recommended to follow the user manual. You can refer to the following standards for maintenance replacement: platinum spark plugs should be replaced at 40,000 kilometers, ordinary nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers.
