When the car has any symptoms, it means that the spark plug should 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. Suppose the ignition ability of the spark plug is poor. In that case, the optimal ignition time will be missed, resulting in incomplete combustion of gasoline, and the burned gasoline is not completely used for work. The intuitive feeling is that the car has insufficient power, high fuel consumption, and a large number of invisible carbon deposits. Replacing spark plugs is considered a routine maintenance item and needs to be replaced regularly, so how many kilometers should be replaced? What must symptoms of the car be replaced?

There is an approximate number of kilometers. Normal spark plugs can be replaced at about 40,000 kilometers, and platinum spark plugs can be replaced with 80,000 to 100,000 kilometers. It is sufficient to follow this number of kilometers in the regular use of a car. Many maintenance manuals suggest that the replacement mileage is shorter than this number of kilometers. Normal spark plugs are required to be replaced at 30,000 kilometers. You can extend the kilometers appropriately because most cars have good ignition performance for 30,000 kilometers of spark plugs. The reason why the manufacturer requested the replacement early is that the 30,000-kilometer car is still relatively new, and the car should be kept in very good condition to enhance the car’s reputation.

The above kilometers are in the case of normal car use. If the driving is very violent and violent, or it is used to pull goods, and people are often full, it needs to be replaced in advance. In addition, it is common for the spark plug to be broken. Many old drivers don’t change spark plugs for a long time and don’t change them when they reach the kilometer. They think they can be used if they are not broken. They don’t change until a certain spark plug is broken, and some even replace which one is broken. 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 is reduced, but it will drop a little every day, and the change is prolonged. I didn’t notice it.

If one of the spark plugs is broken, the phenomenon is that the engine shakes severely, and the acceleration is obviously weak. Because there is one less cylinder to work, naturally, the work is not stable, 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 wires one by one to test. After pulling out the cylinder wire of a certain cylinder, if the shaking becomes 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 it can be disassembled for inspection.

The spark plug is broken before it reaches the number of kilometers to be replaced. Generally, only one broken 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 plug should be replaced at 100,000 kilometers. One of them is broken at 80,000 kilometers. It is recommended to replace all of them. If one of them is broken at 60,000 kilometers, only one can be replaced. Should we replace all of them? There is no specific kilometer standard. If one of them is broken, two other spark plugs should be removed for inspection. If the combustion is in good condition and the gap is not large, there is no need to replace them, so do you need all of them? The replacement must be checked first.

When the spark plug should be replaced, the common phenomena are engine jitter, unstable idling, poor ignition, increased fuel consumption, and decreased power. If these phenomena occur, the spark plug has reached the replacement cycle, and first consider replacing the spark plug. Remove the spark plug and observe the spark plug’s electrode to determine the combustion status of the cylinder. If the electrode is very clean and yellowish-brown, it means that the burning condition is good. If there is a carbon deposit on the electrode, it is black, indicating that the cylinder is not burning well. In addition to replacing the spark plug, check for other faults. There is another standard for judging whether to replace or not. Look at the electrode gap. If the gap becomes larger, you need to replace it. But first, you need to know how large the electrode gap of the new spark plug is. Only after comparing it can you know whether it has become larger.

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