1. When the car starts, the engine does not ignite
Cause: The engine is started by the spark plug ignited by the current of the battery. There may be two reasons for the sudden ignition failure of the engine. First, it is likely that the battery is rusty or the battery drips, and second, it is caused by the engine spark plug moisture in rainy days.
Maintenance method: check whether the battery liquid in the battery is sufficient every two months. If the liquid level is between the upper and lower two lines during observation, it is considered appropriate. At the same time, check the liquid level difference of each tank. If the liquid level is insufficient, unscrew the cover on the battery and pour distilled water to make up the liquid level. Then, check the terminals of the battery and use an iron brush to remove the dirt on the terminals. If the wiring clamp is seriously stained, it can be rubbed along the inner wall with abrasive paper to remove the dirt. If the spark plug is damp, take it out and bake it with a lighter to evaporate the water on it as soon as possible.
2. The increase of vehicle exhaust noise and the increase of exhaust emissions exceed the standard
Cause: This may be due to oxidation of engine exhaust gas at high temperature, resulting in leakage of exhaust system.
Maintenance method: regularly check whether the pipes and interfaces of the exhaust system (especially the muffler) are corroded by exhaust gas and whether the interface pad is damaged. If the exhaust system leaks, go to the 4S store to repair or replace the leaking parts in time. An annual inspection can not only ensure the normal operation of the exhaust system, but also reduce the pollution of harmful substances in the exhaust gas to the environment.
3. Unexplained increase in automobile fuel consumption
Cause: There are many reasons for the increase in fuel consumption. But the most common and easily overlooked thing is the inspection of tire pressure. Insufficient tire pressure will not only increase driving resistance and fuel consumption, but also affect the service life of tires.
Maintenance method: When driving, pay more attention to whether each tire has air, and check the tire pressure regularly. Of course, do not forget to check the spare tire, so as not to find that the spare tire is flat when it is in urgent need of replacement. When the temperature is high, the tire pressure will be higher than usual, so it is more accurate to measure the tire pressure in cold or cool places. Frequently, the tyres should be switched positions every 10000 km to avoid too large difference in wear degree between front and rear. If it is necessary to replace seriously worn tyres, it is better to replace two or four tyres together. Tyres with the same grain can be replaced crosswise. In addition, the tyre with the folded pattern helps to save fuel.
4. The performance of automobile engine is significantly reduced with the increase of fuel consumption
Cause: This is probably caused by the insufficient combustion of oil and the increase of carbon deposition in the engine due to the failure to replace the oil, oil filter, air filter and gasoline filter for a long time.
Maintenance method: The engine oil and oil filter should be replaced every 5000 km, while the air filter and gasoline filter should be replaced every 10000 km, otherwise the impurities in the air, fuel and oil will cause parts wear and block the oil circuit, thus affecting the normal operation of the engine.
5. The car oil pump is damaged
Cause: unreasonable behavior during refueling may cause damage to the oil pump.
Maintenance method: When refueling the car, the owner should try not to wait for the fuel alarm light to light up before refueling. This will shorten the service life of the oil pump. Too little oil or fuel exhaustion may burn the oil pump. If you often drive in the urban area and it is convenient to refuel, you do not need to fill it up at one time, because this may lead to fuel float, sensor failure, fuel gauge distortion and increase fuel consumption, so it is recommended that the owner should refuel when the fuel consumption is almost the same.
6. The battery is unstable
Cause: Abnormal change of electrolyte will affect the performance and reliability of battery.
Maintenance method: When driving in summer, the battery will be overcharged, the electrolyte will evaporate quickly, and the electrode plate is easy to be damaged. Therefore, it is necessary to check the liquid level and the specific gravity of electrolyte (the specific gravity of electrolyte should be smaller than that in winter) of the battery frequently, and to fill the battery with distilled water frequently; Try to avoid the complete discharge of the battery in winter, and pay attention to whether the electrolyte is frozen.
7. Poor effect of windshield wiper
Cause: The wiper blade is damaged, which will cause the cleaning to be not clean.
Maintenance method: First of all, the owner needs to correct the bad habit of dry wiping. It is better to spray some water before turning on the wiper, which is conducive to protecting the wiper blade. Secondly, the wipers sometimes make a gurgling noise. At this time, if the wiper blades are complete, the car owner should go to the 4S store to correct the wiper angle. Finally, if the vehicle is parked for a long time, the owner can find small things such as foam strips or wooden strips to pad under the wiper to separate the wiper blades from the windshield, which can extend the service life of the wiper.
