What should I do if the car is not good to start in winter, and what should I do if the car is diffi

1.Air intake system 2Fuel Injection System The air intake system mainly refers to the throttle and air intake.

The intake valve is located in front of the intake manifold and behind the air cleaner. The models are different, and the locations are far and near. Symptoms:

If the air intake system is dirty, it is easy to cause the vehicle to consume fuel, step on the accelerator and not go forward, or have a feeling of stuck, and if you step on the car again, it will jump forward. How to clean the throttle:1

Remove the set screws of the intake valves. 2.Rinse with throttle cleaner.

3.After a while, wipe it clean with a special soft cloth. How to clean the inlet tract:

1.Remove the throttle. 2.

Secure the tamper-free air intake system cleaner above the front hood. 3.Fill in the cleaning agent.

4.In the case of the vehicle idling, the rpm is maintained at about 1500 rpm for 10-15 minutes. 5.

The detergent is discharged from the exhaust pipe after combustion by the engine. 2.Fuel Injection System The fuel injection system includes an injector and a gasoline tank.

Symptoms: Dirty fuel injection system can easily lead to high fuel consumption, idle shaking, excessive exhaust gas, and high odor. Cleaning Method:

1.Remove the inlet pipe. 2.

Connect the special tools for the fuel injection system. 3.Add no-wash fuel cleaning additives.

4.Adjust the pressure. 5.

However, if the mileage exceeds 100,000 kilometers, it is recommended not to use ultrasonic cleaning, as it is easy to wash the fuel injector. When cleaning the fuel injection system, it is also necessary to pay attention to fire prevention, because when the inlet pipe is removed, gasoline will flow out, and do not pay attention to open flames. 3.

Exhaust system The exhaust system refers to the exhaust light three-way catalysis, which is behind the exhaust pipe. Symptoms: The exhaust system is not maintained for a long time, the gasoline is not good, and it is easy to cause the exhaust pipe to be blocked, especially if it exceeds 80,000 kilometers, the high-speed speed is not good, and the exhaust gas exceeds the standard.

Cleaning Method:1Open the fuel tank cap.

2.Add the three-way catalytic cleaner to the tank. 3.

At idle, the rotational speed is maintained between 2000-3000 rpm for more than 20 minutes. 4.Combustion System The combustion system refers to the combustion chamber, on top of the engine steel drum cover and on the upper part of the piston.

Symptoms: The combustion system is dirty, and the vehicle is prone to carbon deposits, knocking, shaking, poor power, and excessive exhaust gases. Cleaning Method:

1.Lay down the combustion chamber. 2.

Add specialist cleaner. 3.After addition, it is best to maintain a speed of 80-100 kilometers on the third ring road.

However, it is generally not recommended to disassemble and clean.

Find a horse to pull the oil and then fire it when the oil is hot.

In this case, the emergency solution is to put the car in a warm environment, and after a period of time, it can start normally. In extreme cases, it can be forcibly started by using electricity, but it will damage the starter. Therefore, finding a way to increase the temperature of the engine is the right thing to do.

1. The battery is short of power, and the difficulty of starting the car is usually caused by the battery, because at low temperatures, the power consumption of the car will be significantly greater than that in other seasons, and the battery will also become less capacitive due to the low temperature environment. In addition, it should be noted that the usual life of each battery is 2-3 years, so the owner should replenish the battery or replace the new battery in time after entering the winter.

2. The flow of engine oil is blocked, which is more obvious in northern cities where the temperature is particularly low, not only the battery capacity will be affected by the temperature, but also the viscosity of the engine oil will also be affected. The lower the temperature in winter, the viscosity of the engine oil will increase, and the more difficult it will be for the engine oil to move, so that the engine resistance will increase, which will cause the cold start of the car in winter.

3. Engine problems, when the engine is seriously worn or malfunctioning, it will also cause difficulty in starting. If the cylinder and piston are worn, the sealing performance will deteriorate, the amount of air entering the cylinder will be reduced, the cylinder pressure will be reduced, and when the cylinder pressure is too low, the engine will not be able to start.

4. The exhaust pipe is frozen, and the freezing of the exhaust pipe mainly occurs in those car owners who are relatively close to the home and the unit. Their cars were used infrequently, and the water vapor from the combustion of the engine froze on some parts of the exhaust pipe, and the short drive was not enough to melt the ice, and after a night more ice formed. Over time, it will have an impact on the starting and exhaust of the vehicle.

Of course, the solution is actually very simple, run a high speed every weekend in the winter, so that the water in the exhaust pipe can be drained in time with a strong exhaust force.

5. The fuel injector is dirty, after the vehicle is driving for a period of time, due to the chemical reaction of external dust entering and combustion, it is easy to adhere some gum at the fuel injector site, which will block the normal amount of fuel injection and affect the perception and sensitivity of the fuel injector, resulting in poor atomization of gasoline, so that the ignition is delayed and the car is difficult to start.

6. Temperature sensor failure, if the residual water in the coolant is retained in the sensor probe for a long time under low temperature conditions in winter, there will be oil temperature and pressure sensor failure or intake air temperature sensor failure, causing difficulty in starting the car.

Since the car is a mechatronics thing that combines oil circuit and circuit pants to block it, it is difficult to start cold in winter, and I think we can consider maintenance 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 the general 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 lead and unclean, 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.

In winter, it is difficult to start when the car is cold, so you can change the engine oil suitable for winter use. The extended information is as follows: 1. The reasons for the difficulty of starting the cold car in winter:

The difficulty of starting a cold car in winter is mainly due to the low temperature, the viscosity of the engine oil will increase, and the fluidity will be relatively poor, which will increase the resistance of the engine and lead to the difficulty of engine starting. 2. Other precautions: The driver should check the freezing point of the antifreeze, and the freezing point of the liquid antifreeze is 5 to 10 times lower than the minimum temperature in the area where the vehicle is driving.

The easiest thing is to buy a few bottles of starter fluid and put them on the car, and if it is not good to start, you can spray it.

1. Check the status of the battery frequently: it is difficult to start the car in winter, most of which are caused by the expiration of the battery service life. The owner often observes the power display in order to find the problem in time, and if it is found that there is damage or the power drops, it should be replaced in time.

2. Clean up carbon deposits in time: It may be that the engine has too much carbon deposits, which will make it difficult to start, so you should pay attention to cleaning the throttle valve frequently, so that the throttle is kept clean, and you can also go to the store for a comprehensive cleaning.

3. Change the appropriate engine oil: due to the decrease in temperature in winter, the oil flow is difficult, so that the engine combustion resistance force becomes larger, and the power to start the car is insufficient, and the car is naturally difficult to start. Therefore, we want Luyou to change the right engine oil in winter.

4. Replace the spark plug: The spark plug will be burned out and carbon deposition if used for too long, which will easily cause the car to ignite and difficult to start the vehicle, so when the driving time is long, the spark plug should be checked in time, and if there is a problem, replace the new spark plug in time.

Check whether the engine oil is suitable for winter use, and if not, you should replace it in time. For example, when the outside air temperature is -30°C, it is more appropriate to choose 5W 40 engine oil; The 10w-30 oil is suitable for the external temperature range of 25°C to 30°C, and the heat and cold resistance is better than that of 10w 30, but the price will be relatively higher. The oil can be selected according to the local temperature.

If the engine oil is not used for a period of time, especially in winter, it is easy to make some oil in the car deteriorate or freeze and block the oil circuit, which increases the engine resistance and makes it difficult to start.

Sometimes, due to the short distance between the first and the first distance, water vapor may be generated near the exhaust pipe due to the difference between cold and hot temperature, which will freeze the exhaust pipe, resulting in unobstructed exhaust emissions and failure to start.

Solution: If you want to solve the problem of icing, you must first find a way to melt the ice in the exhaust pipe, such as pushing the car to a warmer place or using a thermos to melt the ice in the exhaust pipe, and then start the car, never grill the exhaust pipe with fire.

In winter, the battery will also be affected by the temperature to reduce the capacitance, especially if you don't drive for a long time, the battery power will be lost too much, and it will not start when you start the car, usually the life of the battery is 2 years, and if you maintain it well, the service life of the battery can be extended to 3 years.

If the battery of the vehicle has not passed the expiration date, and this situation also occurs, then you can only find a friend or the service staff of the 4S shop to charge the battery of your car through the battery or power supply of other coarse hail vehicles. After the power is restored, check the battery to see if there is a fault.

The solution to the problem of solving the brother Doukai who can't start the car in the cold is as follows:

1. Check the status of the battery

Generally, the difficulty of starting the car in winter is mostly 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. The nominal service life of the battery is generally 2-3 years, and the maintenance-free battery must be replaced in 2-3 years; The refueling battery can even be used for 6-7 years under good maintenance, check the capacity of the refueling battery electrolyte frequently, if the battery is not leaking but the electrolyte is missing, please replenish the distilled water in time.

2. Change the appropriate engine oil

In winter, as the temperature drops, the viscosity of the oil increases, making it difficult for the oil to flow, which increases the resistance of the engine. If it is difficult to start, check whether the oil label is incorrect. The oil label consists of two parts: grading and viscosity specification.

At present, most of the engine oils on the market use SAE and other grades to mark the viscosity, SAE is the abbreviation of the English "American Society of Automotive Engineers". For example, in 5W-40, "W" means Winter, which refers to the low temperature viscosity grade of the engine oil, the more ** the number in front of it, the better the low temperature fluidity of the engine oil, the lower the ambient temperature that can be used by the consignment auspicious watch, and the better the protection ability of the engine during cold start. The number after the "-" is the high temperature viscosity grade of the lubricant, the higher the number, the greater its viscosity, and the higher the applicable maximum temperature.

If you were using a 5w-40 oil, consider switching to a 5w-30 or 0w-40 oil in the winter to reduce the oil viscosity and make it easier to start.

3. Replace the spark plug in time.

After a few years of use, spark plugs are prone to cause problems such as carbon deposition, leakage, excessive clearance, and ablation, which will cause difficulties in car ignition, cold start, and even hot engine start, and often need to be ignited multiple times. Therefore, when driving to a certain number of kilometers or feeling that the vehicle is difficult to start, driving weakly, shaking, increasing fuel consumption, or inexplicably stalling, please check the spark plug status and replace it in time.