When to Replace Spark Plugs?

There are many parts in a car, and each part plays a vital role. Reasonable maintenance can reduce the failure rate and prolong the service life of the car. For example, spark plugs have a great influence on the performance of the engine and also determine the performance of the car. If the spark plug is broken, the engine will not work normally, and the car will naturally not be able to drive, so it needs to be replaced in time. So what is the precursor to the car spark plug need to be replaced?


1. The engine vibrates violently: The engine plays an important role in the smooth start of the car, and the spark plug is also a key component. Whether the car can run smoothly and continuously depends on whether the engine is strong, and whether the engine can work normally depends on the spark plug. Once abnormal vibration occurs, attention should be drawn quickly, otherwise the engine will be overhauled.

2. The increase in fuel consumption leads to: on the one hand, the fire is serious and the oil that should have output power is wasted. On the other hand, due to the reduction of ignition energy, the gasoline that should burn quickly and fully release energy does not completely release all energy, so the fuel energy is not fully utilized, and fuel consumption increases.

3. Abnormal startup: If it still fails to start for a long time, it means that the spark plug needs to be replaced. Spark plug ignition energy aging. The spark core produced is very small, and the mixed air flow in the cylinder is likely to blow out the spark core, resulting in ignition failure and no fire.

4. Crash situation: Under normal circumstances, the car is relatively stable and there will not be too much abnormal movement, but when the car shakes, it may be caused by insufficient fuel supply and sudden fast and slow driving.

5. Serious carbon deposits on the spark plug: Improper adjustment of the mixed gas concentration, too high a mixed gas concentration will lead to incomplete combustion of fuel in the cylinder, resulting in increased carbon deposits. In this case, the spark plug needs to be replaced in time.

6. The larger the spark plug gap: more energy is needed to get through the air during ignition, but the power of the ignition coil is designed according to the standard gap, so the larger the gap of the spark plug will lead to the load of the ignition coil, the ignition coil is easy to heat and burn out, causing the engine to burn out . Lack of cylinders. After a long time of use, the electrode of the spark plug will also have carbon deposits, which will also affect the ignition efficiency of the spark plug.

7. The spark plug does not ignite normally: due to the loss of magnetism, the ignition coil and the electronic igniter are "false short circuited", and the wire connection between the output end of the generator and the electronic igniter is loosely connected to the input end of the ignition coil, which directly affects the ignition of the spark plug. Replace spark plugs.

8. Incomplete combustion: If the engine burns oil or incomplete combustion, black oil stains will appear on the spark plug. This is carbon deposits, which will cause the spark plug to fail to ignite normally. At this time, the spark plug needs to be replaced.

9. Weak acceleration: When the car is found to be accelerating, the engine shakes abnormally, which is probably caused by the decline in the performance of the spark plug. The decline in the performance of the spark plug will cause the ignition performance of the engine to plummet, and the acceleration will be weak.

The spark plug must be paid attention to, because a bad spark plug may affect other parts of the vehicle, so remember to replace the spark plug regularly, and also pay attention to the failure caused by the spark plug problem.