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The function of the spark plug is to ignite. When the cylinder runs to the top dead center, the gasoline can be burned to generate energy through the ignition of the spark plug. Therefore, the stronger the ignition ability of the spark plug, the better. If the ignition ability of the spark plug is poor, the optimal ignition time will be missed, resulting in incomplete combustion of gasoline, and the burned gasoline is not fully used for work. The intuitive feeling is that the power of the car is poor, the fuel consumption is large, and there will be a large amount of invisible carbon deposits. Replacing spark plugs is also a routine maintenance item and needs to be replaced regularly, so how many kilometers should be replaced? What are the symptoms of the car that needs to be replaced?
The function of the spark plug is to ignite. When the cylinder runs to the top dead center, the gasoline can be burned to generate energy through the ignition of the spark plug. Therefore, the stronger the ignition ability of the spark plug, the better. If the ignition ability of the spark plug is poor, the optimal ignition time will be missed, resulting in incomplete combustion of gasoline, and the burned gasoline is not fully used for work. The intuitive feeling is that the power of the car is poor, the fuel consumption is large, and there will be a large amount of invisible carbon deposits. Replacing spark plugs is also a routine maintenance item and needs to be replaced regularly, so how many kilometers should be replaced? What are the symptoms of the car that needs to be replaced?
There is an approximate number of kilometers. Ordinary spark plugs should be replaced at about 40,000 kilometers, and platinum spark plugs should be replaced at 80,000 to 100,000 kilometers. It is enough to follow this number of kilometers under normal car use. There are many maintenance manuals that recommend replacement mileage shorter than this number of kilometers. Ordinary spark plugs require replacement at 30,000 kilometers. You can extend the number of kilometers appropriately, because most cars have good ignition performance of spark plugs with 30,000 kilometers. The reason why the manufacturer asks to change it early is because the 30,000-km car is still relatively new, and it is necessary to keep the car in a very good condition to improve the reputation of the car.
The above kilometers are for the normal use of the car. If the car is very violent and violent, or it is often used to pull goods and people, it needs to be replaced in advance. In addition to this, it is common for the spark plug to fail. Many old drivers don't change the spark plug for a long time, and they don't change it when the number of kilometers is reached. This is an incorrect way to maintain a car. Even if the spark plug is not broken, the power and fuel consumption will be affected after the ignition ability drops. It just drops a little every day, and the change is very slow and I don't notice it.
If one of the spark plugs is broken, the phenomenon is that the engine vibrates severely and the acceleration is obviously weak. Because there is one less cylinder to work, naturally the work is not smooth and the power drops. If there is a computer tester, it is easy to detect which cylinder is not working. If there is no computer tester, you can pull out the cylinder lines one by one to test. After pulling out the cylinder line of a certain cylinder, if the vibration is more serious, it means that the spark plug of this cylinder is not broken. If the severity of the jitter does not change, it means that the spark plug of this cylinder is broken, and you can disassemble it for inspection.
The spark plug is broken before reaching the number of kilometers to be replaced. Generally, only one damaged one can be replaced. If it is close to the number of kilometers to be replaced, it is recommended to replace all of them. For example, the spark plugs should be replaced at 100,000 kilometers. If one of them is broken at 80,000 kilometers, it is recommended to replace them all. If one of them is broken at 60,000 kilometers, you can only replace one. There is no specific mileage standard for whether all should be replaced. In the case of one broken, one or two other spark plugs should be removed to check. If the combustion state is good and the gap is not large, there is no need to replace it, so do all the spark plugs need to be replaced? Replacement must be checked first.
The common phenomenon when the spark plug should be replaced is that the engine vibrates, the idle speed is unstable, the ignition is not good, the fuel consumption increases, and the power decreases. If these phenomena occur, the spark plug has reached the replacement cycle again, and the first consideration is to replace the spark plug. Remove the spark plug and judge the combustion condition of the cylinder by observing the electrode of the spark plug. If the electrode is clean and brown, it means the combustion is in good condition. If there is carbon deposition on the electrode, it is black, indicating that the combustion condition of the cylinder is not good. In addition to the spark plug to be replaced, but also to check whether there are other faults. There is another criterion for judging whether to replace. Look at the electrode gap. If the gap becomes larger, it needs to be replaced. But first, you need to know how big the electrode gap of the new spark plug is. You can only know if it becomes larger after comparison.
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