Spark plug
Spark plug is an important component of gasoline engine ignition system, it can introduce high voltage into the combustion chamber, and make it skip electrode gap and spark, so as to ignite the combustible mixture in the cylinder. It is mainly composed of a wiring nut, an insulator, a wiring screw, a center electrode, a side electrode and a shell, and the side electrode is welded on the shell.
How to determine the spark plug to change?
To determine whether the spark plug needs to be replaced, you can do it in the following ways:
Observe the spark plug color :
Under normal circumstances, the color of the spark plug should be brown or brown.
If the spark plug color turns black or white, it indicates that the spark plug has been severely worn and needs to be replaced.
The spark plug appears smoky black, which may indicate that the hot and cold type of the spark plug is selected incorrectly or the mixture is thick and the oil is flowing.
Check the spark plug gap :
The electrode gap of the spark plug will gradually become larger during use.
Under normal circumstances, the electrode gap of the spark plug should be between 0.8-1.2mm, and it is also said that it should be between 0.8-0.9mm.
If the electrode gap is too large, the spark plug needs to be replaced.
Observe the length of the spark plug :
The spark plug will gradually wear out and become shorter during use.
If the spark plug length is too short, it needs to be replaced.
Observe the surface condition of the spark plug :
If there is damage to the spark plug surface, such as electrode melting, ablation and round, and the insulator has scars and cracks, it indicates that the spark plug has been damaged and needs to be replaced in time.
The top of the spark plug appears scarring, black lines, cracking, electrode melting and other phenomena, but also a sign of replacement.
Vehicle performance :
Abnormal engine jitter during acceleration may be a sign of reduced spark plug performance.
The obvious jitter at idle may be a reflection of the spark plug performance decline or quality problems.
The vehicle acceleration is weak, and the engine vibration is obvious when the accelerator is pressed, which may be the performance of spark plug failure.
Reduced vehicle power and faster fuel consumption may also be a sign of spark plug damage.
Ignition sound :
Under normal circumstances, after turning on the engine, you can hear the crisp ignition sound.
If the ignition sound becomes dull or there is no ignition sound, the spark plug may have failed and needs to be replaced.
Startup situation :
If the engine does not start normally, or will often stall after starting, the spark plug needs to be replaced at this time.
In summary, to determine whether the spark plug needs to be replaced, it can be comprehensively considered from the color, gap, length, surface condition of the spark plug, as well as the performance of the vehicle and the ignition sound. Timely replacement of spark plugs can ensure the normal operation of the vehicle and improve the safety and comfort of driving.
4 Signs of a broken spark plug
Four signs that a spark plug is broken include:
startup difficulty : When the spark plug fails, starting the vehicle will find it difficult to start, it may take several attempts to start, or a long wait to start.
engine jitter : when the vehicle is idling, the engine will feel regular jitter, and the jitter will disappear when the speed rises after the start, which is an obvious signal of the spark plug fault.
power drop : Spark plug damage will lead to a decrease in engine power, especially when accelerating or climbing, it will feel insufficient power and slow speed.
increased fuel consumption : spark plug damage will affect the working efficiency of the ignition system, resulting in inadequate combustion of the mixture, thereby increasing fuel consumption.
In addition, damage to the spark plug may also lead to abnormal exhaust emissions, and inadequate combustion of the mixture will produce harmful substances, affecting the environment and human health.
In order to ensure driving safety, once these signs are found, it is recommended to go to a professional auto repair shop or 4S shop in time to check and replace the spark plug.
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