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Judging engine failure from spark plug color analysis

2019-11-11 12:46:18
正常颜色为棕白色,如电极烧黑并附有积炭,则说明存在故障。 The normal color of the electrode of the spark plug is brown and white. If the electrode burns black and has carbon deposits, it indicates that there is a fault. 导通,用中央高压线触接火花塞的接线柱,然后打开点火开关 ,观察高压电跳位置。 During the inspection, the spark plug and the cylinder can be connected, and the terminal of the spark plug is contacted with the central high-voltage wire , and then the ignition switch is turned on to observe the high-voltage electric jump position. If the electric jump position is in the gap of the spark plug, the spark plug works well; otherwise, it needs to be replaced with a new one.

Normal spark plugs <br /> Normal spark plugs are light brown.


Normal color of spark plug after burning




,俗称烧机油Engine Burning Oil <br /> The spark plug has serious carbon deposits, and the oil has flowed to the combustion chamber, which is commonly known as burning oil. This kind of car exhaust pipe will emit billowing blue smoke.



故障。 Spark plug too wet <br /> The heat value of the spark plug is too low or the electrical control system is malfunctioning .



There are glass-like things on the spark plug. <br /> The spark plug is stuck with sand, and the car's air filter is not sealed properly. As a result, the sand enters the combustion chamber, and the sand melts on the spark plug due to the high temperature of combustion.



There are molten aluminum balls on the spark plug. <br /> There are many small molten aluminum balls on the molten aluminum spark plug. This is because the ignition angle is advanced too much. As a result, the high temperature of the ignition is too late to emit, and the molten aluminum ball of the piston sticks to the spark plug.



Spark plugs are whitish <br /> The cause of the failure is that the mixture is too thin, which can cause the engine to overheat. Failure to do so can cause serious engine failure.



Black fleece on the spark plug
损坏、电控系统故障等。 The cause of the failure is that the air filter is too dirty, the oil pressure regulator vacuum tube is broken, the gasoline pressure is too high, the oxygen sensor is damaged, and the electronic control system is faulty.



有误,点火角提前太多,混合气稀,冷却系统温度过高, 润滑系统机油等。 Spark plug ablation <br /> The cause of the fault is that the heat value of the spark plug is mismatched, the ignition angle is too much ahead, the mixture is lean, the cooling system temperature is too high, and the lubrication system is short of oil.



Spark plug center electrode shortened <br /> The cause of the failure was that the spark plug was not replaced during maintenance.



Spark plug center electrode rounded

时耗电量很大,而且还会导致发动机工作不良。 The cause of the failure is that the spark plug has been used for too long, and such a spark plug consumes a lot of power when ignited , and it will also cause the engine to malfunction.


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