What are the reasons why the cold car is not good to start in the morning?

1. Most of the difficulties in starting the car in winter are caused by the loss of battery power or the expiration of the battery service life. When the battery is low, the speed is weak when starting the car, and only the clicking sound is heard, and the clicking sound will gradually become a clicking sound when the ignition is lit again. Do not ignite continuously to avoid the battery running out.

Do not park the vehicle for a long time in winter, generally park the vehicle for a week to drive out for a circle, so that the battery power can be effectively replenished.

2. In winter, as the temperature decreases, the viscosity of the engine oil will increase, and the oil flow will be difficult, so that the engine resistance will increase. If it is difficult to start, check whether the oil label is incorrect.

3. After a few years of use, the spark plug is easy to cause problems such as carbon deposition, leakage, excessive gap, and ablation, which will cause difficulties in the ignition of the car, and it is very difficult to start the cold start or even the hot engine, and it is often necessary to ignite many times.

There is too much carbon deposit inside the engine, because the lower the temperature, the greater the amount of oil required for cold start, and the more the existence of carbon deposit will affect the smooth cold start. Everywhere inside the engine, carbon deposits can have a negative impact on the normal operation of the engine. For example, when there is too much carbon in the combustion chamber, the compression ratio of the engine will increase, forming many hot surfaces, causing premature ignition and explosion.

1. The battery loses power

The battery loss of power is the most common reason for the difficulty of ignition in cold weather, affected by the temperature, the lower the temperature, the lower the capacity of the battery. Generally, the life of the battery is about 3 years, if the engine is difficult to start, the headlights are obviously dimmed or the horn sound is not high, you should check whether the battery is out of power.

2. Carbon deposition on the throttle

When the weather gets colder, the car is not easy to ignore, and it may also be caused by carbon deposits on the throttle. If you don't ignite twice, add the throttle when you turn on the third time, or step on the accelerator while ignition, so that you can ignite immediately, and remember to clean the throttle later.

3. Spark plug aging

The spark plug is the key to the ignition system of the car, if we find that it is difficult to ignite in the cold car state, there is obvious frustration when driving, idle shake or engine acceleration performance decreases, this is the phenomenon of spark plug aging, we need to check and replace it in time.

The correct way to light a fire is:

Insert the key and rotate until the ACC stops, wait for about 2-3 seconds, let the main power relay contacts be firmly contacted, and let the first part of the device that needs to be energized be energized; Continue to turn the key to on, stop waiting for 6-10 seconds, let the oil pump relay engage, wait for the adjustment status of each sensor to complete, turn the key to start to the engine after continuous operation and return to on, under the guidance of the computer, automatically adjust the best position and the best parameters, and finally start the engine successfully.

However, it is possible to stop temporarily or for a short period of time without pausing, and simply observe the yellow signal light on the instrument cluster to turn off and start quickly.

Reasons: 1. Excessive carbon deposition in the air intake system and the root of the intake valve causes the mixture concentration to be too thin during cold start.

2. The throttle is seriously dirty and the air intake is insufficient.

3. The speed of the starter does not meet the requirements.

4. The contact resistance of the connecting wire of the battery is too large; The battery is low.

5. The viscosity of the lubricating oil of the transmission is too thick, resulting in too much running resistance of the engine.

6. The cylinder compression pressure of the engine is insufficient.

Question: I can't catch fire in the morning.

Both the motor and the battery are good.

Gasoline pressure is less than 4Fuel injector throttle deposition, 5Carbon deposits on the back of the valve, 6

The signal of the water temperature sensor is inaccurate, 7The oxygen sensor is damaged.

It is not good to drive a cold car, and it is generally a battery problem. Of course, if the car does not regularly replace the spark plug and gasoline filter, it will also affect the cold start of the car!

It may be that there is a problem with the ignition system of the engine, or that the gasoline atomization of the gasoline supply system is not sufficient. The particles of gasoline atomization are relatively large, so it is more difficult to ignite, or the ignition coil of the ignition system does not produce enough voltage, and there is too much carbon deposited on the spark plug. These are all possible.

The spark plug is the key to the ignition system of the car, if we find that it is difficult to ignite in the cold car state, there is an obvious sense of frustration when driving, idle shake or engine acceleration performance decreases, this is the phenomenon of spark plug aging, which needs to be replaced in time, and then the viscosity of the oil is large, the viscosity of the oil will increase at low temperature, and it will become difficult to flow almost to the flow, and the resistance of the engine start will also increase, and the car will naturally not be bad, so we still use the oil with a relatively low viscosity in winter. I remind everyone that the start time is not too long, control within five seconds, if the start of three times still can't hit, then stop for half a minute, so as not to turn on the battery.

The reasons for the cold car to start poorly: 1. The injector is not injected; 2. Failure of coolant temperature sensor; 3. Failure of air intake sensor; 4. Poor atomization of the injector; 5. Carbon deposits in the intake pipe; 6. Insufficient ignition energy; 7. Spark plug failure; 8. Failure of idle control valve, etc.

If there is no improvement, turn the ignition switch to the ON gear before the cold car starts, let the fuel pump work by itself for three seconds to establish the oil pressure before starting, if the cold car starting performance is improved, most of the fuel pump pressure is insufficient or working abnormally, and replacing the fuel pump can generally be solved.

Emergency method: Put the car in a warm environment, and the car can start after a while; Or use the method of cleaning the oil circuit to solve it completely.

If there is no problem with the above, you can combine the diagnostic computer to read the relevant data stream, such as water temperature, ignition signal, fuel injection pulse width and other data, compare the same model to see if it is normal, and check whether the ignition coil and spark plug are abnormal, and clean the throttle valve according to the situation and then test after matching.

When there is too much carbon deposit inside the engine, the gasoline sprayed by the cold start fuel injection head will be absorbed by the carbon deposit, resulting in the mixture of cold start being too thin, making it difficult to start, until the gasoline absorbed by the carbon deposit is saturated, it is easy to get started, and the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine after landing, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start.

Photo by Q&A) @2019

The reasons for the failure of the cold start injector include the cold start injector does not spray the oil, the coolant temperature sensor failure, the air intake sensor failure, the injector atomization is poor, the intake pipe carbon deposition, the ignition energy is insufficient, the spark plug failure, the idle control valve failure, etc.

The oil quality is poor, and the volatility of inferior fuel is very poor, especially in winter, when the temperature is low and the cold car starts, the engine block temperature is low, and the fuel is difficult to atomize, resulting in the fuel injected into the cylinder can not be fully mixed with the air, resulting in difficulty in starting, or even not starting.

Excessive carbon deposition in the valve and intake pipe leads to difficulty in cold starting, because carbon deposition can absorb the appropriate amount of fuel, the lower the ECU judgment, the lower the temperature, the greater the amount of oil required for cold start, and the more carbon deposition exists, the more it will affect the smooth cold start. Everywhere inside the engine, carbon deposits can have a negative impact on the normal operation of the engine.

The spark plug is not replaced in time is also a common factor, the cold car starts need a higher ignition energy, and the spark plug fiber filial piety in the use of a certain mileage after its electrode gap will become larger, if it exceeds the standard after the spark energy it produces will be greatly weakened, can not be normal gas in the gas cylinder (commonly known as the lack of cylinder), it is naturally difficult to start. (Photo by Cao Bo of Pacific Automobile Network).

Reasons for the difficulty of cold start in a car are: faulty fuel pressure regulator, low coolant temperature, excessive carbon deposits, and faulty fuel injectors. Generally, the car is not easy to start in the case of a cold car, and it is not easy to start several times in the case of a cold car, and it is good to wait for the temperature to rise.

As a means of transportation for daily travel, with the increase of service life. It is inevitable that there will be various failures, among which the most headache for the majority of car owners is the difficulty of starting the car.

The reason for the difficulty in starting the car.

1.Excessive carbon deposits in car engines. When the oil is burned, it will inevitably leave some carbon deposits over time. If it is not dealt with in time, it will become more and more, which will eventually lead to insufficient oil combustion and difficulty in starting.

2.There is a problem with the spark plug. The spark plug is an important factor that directly affects the start of the car. Once there is a leak and the gap is too large, it will cause the car to start difficult, and it often requires multiple ignitions to successfully dry up.

3.The temperature is too low. Motor oil is a liquid. As the air temperature decreases, the viscosity of the oil increases, making it harder to flow and subjecting the engine to more drag. As a result, the car needs to be started multiple times before it can be started.

4.There is a problem with the battery. If the battery is dead, or if the circuit is short-circuited, it will lead to insufficient engine power or weak ignition, which will make it difficult to start the car.

Solution to starting difficulties: Generally, when the car encounters difficulty in starting, it is due to the failure of auto parts or excessive carbon deposits, and it can be dealt with by a special repair shop.

Precautions for car starting difficulties.

In winter, the car should not be parked for a long time, and it is best to use it once a week to ensure that the car battery can be effectively replenished and prevent its accelerated aging.

Battery loss is the most common cause of poor booting in cold weather. Affected by temperature, the lower the temperature, the lower the battery capacity. At low temperatures, the viscosity of the oil increases, the fluidity of the oil deteriorates, and the resistance to engine starting increases, making it difficult for the car to start naturally.

Car owners need to note that the life of each battery is usually 2-3 years, so car owners should replenish the battery or replace it with a new battery in time after entering the winter. When the viscosity of the oil increases, it is difficult to start. The emergency plan is to put the vehicle in a warm environment and start normally after a while.

To solve the problem thoroughly, it is best to go to a 4S shop for professional winter maintenance and change the appropriate engine oil according to local conditions. In winter, after parking for the night, the oil has already flowed into the oil pan. However, after the engine is warmed up, the oil cannot be immediately delivered through the oil pump to the pistons where the engine is most lubricated, so the engine needs to be warmed up.

The warm-up time should not exceed 1 minute, and the optimal time is between 30 seconds and 1 minute.

Since the car is a mechatronics thing that combines oil circuits and circuits, it is difficult to start cold in winter, and I think maintenance can be considered from the following aspects: First, pay attention to the battery Battery. The number of plates in the battery determines the voltage of the battery, and generally the 12V battery has six plates.

Therefore, generally if it is a normal battery, its voltage should be a little more than 12V with a meter. Another note: the battery should generally be able to start at a low temperature of -30 degrees.

When you feel weak start-up and the headlights are yellow, it's time for you to pay attention to your battery. Second, pay attention to the throttle valve body This part is something that the general EFI engine has, because of the air quality, this part is a happy dirty place when driving to a certain number of kilometers. This part is not clean, the phenomenon is that it is not easy to start cold, the acceleration is not smooth, it is also more fuel-intensive, and the idle speed is unstable.

Wash it and then reset the instrument. When you run more than 3,000 kilometers, take it out yourself, clean it up, shake it, blow it. Pay attention to the operation of this part in winter, personal experience is that it is recommended to heat up the car, because this part has more plastic, if the cool car operates on this part, it is easy to damage the part.

3. Gelatinization of the fuel injector The fuel injector is a more precise component in the engine oil circuit architecture, and its working condition directly affects the working efficiency of the engine. However, due to the uneven quality of gasoline, coupled with the fact that gasoline contains gum substances, after a long time, the fuel injector will have the phenomenon of gelatinization, which also makes it difficult for the car to start cold, and if the temperature rises after starting, the gum will become sparse due to the change of temperature, and the power of the engine is ideal. When the engine reaches a certain mileage, the fuel injector must be disassembled and cleaned at a certain time.

Fourth, the carbon deposit of the engine There are two main reasons for the generation of carbon deposit in the engine: one is the quality of the oil; There is also traffic jams, driving at low speeds or idling for too long. If there is too much carbon inside the engine, the gasoline emitted from the fuel injector during cold start will be absorbed by the carbon deposit, which will cause the mixture to be too thin for cold start, making it difficult to start.

Therefore, it is necessary to clean the carbon deposits of the engine after driving to a certain mileage. Questioner's comments.

1. Find other cars or batteries to take power.

When the car is in a low temperature environment, the concentration of the electrolyte will become much larger, which brings a lot of resistance to the battery. Once the current of the battery drops, it is not easy for the owner to start the car. To solve this problem, the owner can find a car or find a battery to power, so that the car can be started easily.

2. Clean the carbon deposits of the engine.

When there is too much carbon in the engine, it can make it difficult to start the car, and as long as this carbon deposit is removed, the owner can easily start the car. This kind of thing can be operated by the owner himself at home, and there is no need to spend money to find a master to clean it.

3. Replace the spark plug with a new one.

Expired spark plugs will have a much lower ignition capacity, so that the owner is less likely to ignite when starting the car. To get the car started so easily, you need to replace it with a new spark plug so that it doesn't take much time to ignite.