The spark plug just changed burns out?What is going on when the newly installed spark plug is black

The spark plug that was just replaced burns out. The reason may be that the spark plug gap is too large; there is no high-pressure fire or the ignition time is too late, which will result in incomplete fuel combustion and black carbon deposits; excessive fuel injection or dripping from the fuel injection nozzle will cause excessive mixed gas. Thickness will also make the spark plug black. When the mixture is too thick, it will cause insufficient combustion and easily produce carbon deposits. Carbon deposits and impurities adhere to the top of the spark plug, which will further affect the work of the spark plug. Therefore, it is necessary to investigate the problem in time, remove the carbon deposit, and solve the problem of spark plug blackening.

If the mixture is too thick, it usually means that the sensor of the engine is malfunctioning and the information fed back to the computer is wrong, which makes the fuel injection volume controlled by the computer too thick, resulting in incomplete combustion and carbon deposits. Engine sensors generally refer to water temperature sensors, oxygen sensors, intake pressure sensors, throttle position sensors, air flow meters, and so on.

When installing spark plugs by themselves, car owners should pay attention to choosing suitable spark plugs, including spark plug material, spark plug calorific value, and so on.

The calorific value of the spark plug is best to use the same as that of the original car. If the calorific value becomes larger or smaller, it will have a certain impact on the operation of the engine. Insufficient power and other conditions may even cause the spark plug to become too hot due to insufficient heat dissipation, which will further cause deflagration and other phenomena.

If the heat value of the spark plug is increased, the heat dissipation capacity will be stronger, the temperature of the spark plug will drop faster, and the ignition head will easily produce carbon deposits, which will cause electricity to run and the spark plug will not jump out of the fire.