Many car owners are very anxious when they suddenly encounter that the car can't start. Their first reaction is that the car is broken. In fact, most cars fail to catch fire due to human factors. Here are the main reasons why the car I carefully sorted out for you can't start. Let's have a look.
The first may be a circuit or electronic failure. Blown fuse, open circuit of high voltage coil, open circuit of low voltage circuit, falling off of central ignition wire, leakage of ignition head and damage of spark plug.
Then there is oil circuit failure. The flameout caused by oil circuit failure often has the symptoms of engine weakness and oil pedal stepping on cotton. Possible parts of oil circuit failure include: oil pump failure, oil circuit blockage, oil filter blockage and nozzle damage.
The last thing to check is the battery. In many cases, the battery has failed, but it can still turn on the headlights. This is not surprising. Only at the moment of ignition can we really test the performance of the battery. Because its load is the largest at this time. There is another simple way: observe the outer wall of the battery with the naked eye. If it is found that it has expanded and deformed, it means that a new battery is absolutely necessary.
The reason why the starter does not work is not only the battery, but also the damage of the ignition switch, ignition relay or the starter itself.
After ignition, the upper half of the engine is in a state of no oil and lack of lubrication. It takes about 30 seconds after starting to transport the oil to the piston, connecting rod, crankshaft and other parts that need lubrication most because of the operation of the oil pump pump.
After the vehicle is started, the lubricating oil is not supplied in place at idle speed, so it is most prone to wear. According to statistics, more than 90% of the wear of engine parts is caused within three minutes after the cold start.
The correct way to warm up the car should be to go on the road one minute after starting, but at this time, do not drive at high speed. Keep it at a low speed. The engine speed is limited to no more than 3000 rpm, generally 2000 rpm. Otherwise, the severe wear and tear suffered by the engine and gearbox cannot be recovered. After the engine temperature rises to the normal operating temperature, resume normal driving.
The automatic vehicle shall drive for 3 ~ 5 minutes under 2000 rpm in gear D. even if the accelerator is not pressed, the low speed at idle speed is enough to make the vehicle move forward slowly. At this time, the automatic transmission will not upshift, the oil in the transmission can be fully circulated, and the oil viscosity gradually returns to normal.
After starting in winter, the water temperature will be lower than the normal temperature, and it can be accelerated gradually after the water temperature is normal. Wait in place after ignition and landing (the waiting time depends on the relatively stable time after the speed drops, generally no more than one minute).
Hot car: let the car warm up for a while after the ignition. If the temperature is too low, even if the car is on fire and the oil supply is not smooth, the car will suffocate. At this time, pay attention to the sound of the car. If the sound is normal, the hot car is smooth. If the sound is abnormal, add some oil and try not to let the car go out. If all goes well, get out of the car and get rid of the frost on the window.
Defrosting flower: when the key is on the car and the car is hot, put down the glass, open the window, and then people get off, so as to prevent the door from being locked automatically after people get off. Such accidents often occur. Then find a plastic card to scratch the window. All kinds of membership cards are the simplest and best tool. Windows and windscreens can be easily scraped off.
Hot car: the car has just started, the water temperature is zero, and the heating cannot run. When the car is driving, the speed should be below 20 per hour and in gear 2 as much as possible. Run until the water temperature rises and then drive normally. At this time, the heating also has warm air. You can blow the glass normally. If the window is not scratched, you can't see the road clearly during this period of time. Pay attention, great gods. Don't make this mistake after a thousand.
Precautions in winter: in winter, negative 35 diesel oil is generally added to diesel oil. When the diesel temperature is low, it will wax, and then continue to reduce the temperature, it will solidify. Negative 35 diesel can be used at a low temperature of minus 35 degrees, so zero diesel is more likely to make the car unable to start. Also remember to keep your car warm in winter. If possible, try to park in the indoor parking lot. If not, remember to keep warm manually and cover the hood of your car with a quilt.