What is the reason why the car can t catch fire when it s cold

First of all, we need to know which reasons are not easy to start and are related to temperature.

The factors that affect the start of the engine are: air intake system, oil supply system, ignition system, lubrication system, etc.

Air intake system: When the weather turns cold, after the fuel is injected into the intake pipe, the atomization effect is not good, if there is carbon deposit in the engine intake system at this time, and part of the fuel in the mixture is adsorbed, which will cause the mixture to be not easy to ignite in the cylinder. Then at this time, we can consider cleaning the engine intake tract and throttle.

Fuel supply system: it is not easy to establish oil pressure in the engine fuel supply pipe, this situation mostly occurs in the morning when the temperature is particularly low, due to the dirty fuel pipeline or nozzle, when the temperature is particularly low, the water and the debris in the fuel are mixed so that the fuel pipeline is not smooth, and the result is not easy to start or can not start. The solution is to use the method of cleaning the oil circuit to completely solve the ignition fault.

Ignition system: when the weather is cold, if the ignition ability is too weak, it is difficult to ignite the mixture with poor atomization effect, at this time we must consider checking whether the spark plug aging gap is too large, whether the ignition coil is aging In addition, when the weather is cold, the capacity of the battery will also become low, we can judge whether the battery is lost power through lights, horns and other electrical equipment.

Lubrication system: At low temperatures, the viscosity of the engine oil will increase, the flow of oil will become difficult, and the resistance of the engine will also increase, and the car will naturally be difficult to ignore. Therefore, it is more appropriate for us to use a lower viscosity oil in winter.

Generally, the cold weather does not catch fire is common for the above reasons, especially remind the majority of car owners: if there are difficulties in the system, each start time should not last too long, it is best to control within 5 seconds, if the start 3 times or not ignited, then you need to stop for half a minute to avoid damage to the battery, or lead to excessive fuel accumulation in the cylinder.

If it is a carburetor type engine, you can pull the choke and it can be easily started.

In the case of an engine with a high-pressure common rail fuel system, it is possible that the intake air temperature sensor has failed.

There are many reasons for this situation, such as poor line contact, battery failure, etc.

You can consider that the battery is dead.

When the weather gets colder, the phenomenon of cars not being able to ignite will become more and more serious, especially when the car is older. Some of them have to be fought several times before they can be hit, and some of them can't be ignited directly, and some are faulty. Today we will talk about what to do if you can't catch fire?

What are the common causes of failure to ignite?

First of all, you should pay attention to the ignition, do not fire for more than 5 seconds each time, if it is not lit for 5 seconds, release the key, and then light the fire again, do not keep screwing the key without the car playing. If you don't hit it three times in a row, it's best to wait half a minute before starting the fire. Because the current during ignition is very large, it may burn out the starter and circuit, so that the instantaneous discharge of the battery is too large, shorten the life of the battery, wait for half a minute for the battery power to recover.

When the weather gets cold, it is not easy to ignite, and the vast majority of vehicles are caused by carbon deposits, which is also the most common reason. If you don't ignite twice, add the throttle to the third time, or release the throttle repeatedly while igniting, so that it is easier to hit. Because after the number of ignitions, there will be residual gasoline in the cylinder is not discharged, even if the vehicle does not have any fault, because there is gasoline residue in the cylinder, resulting in the mixture is too thick and can not be landed, stepping on the accelerator can increase the air intake volume and reduce the concentration of the mixture.

If you don't step on the accelerator and can't ignite, you can ignite immediately when you step on the accelerator, which means that the throttle has carbon accumulation and you need to clean the throttle. If there is carbon deposit, it can be solved by cleaning, and there may be parts that are damaged and need to be replaced to solve it. Generally, the following parts are broken, which will also lead to poor ignition.

1.If the throttle or idle motor is broken, it is similar to the reason why they have carbon deposits, and they cannot self-adjust after they are broken, and the state is the same with and without ignition. The air during ignition can only enter through the hole reserved by the throttle valve, or through the idle motor, because they are broken and cannot adjust the air intake, so the air-fuel ratio is incorrect and the car cannot be landed.

2.The gasoline pump is damaged. The gasoline pump does not work, and without gasoline entering the cylinder, it naturally cannot ignite and cannot work properly.

The life of the gasoline pump is longer, and generally the car is more than 5 years old, which can be considered as a problem with the gasoline pump. The way to check if the gasoline pump is damaged is very simple, just press the oil pressure check port on the gasoline track to see if there is any gasoline spray, or connect the gasoline pressure gauge to check the oil pressure.

3.The ignition coil is damaged. It refers to the integral ignition coil, and after it is broken, each cylinder cannot be ignited, so it cannot be ignited.

The kind of one that has an ignition coil for each cylinder, and the broken one can also ignite, but the shaking is more serious. If the throttle does not ignite, the carbon deposits and throttle faults are ruled out, and the next step is to check the oil circuit and circuit. If the oil circuit and circuit are also normal, then a certain sensor is faulty, and the following two sensors are commonly affected by ignition.

4.Crankshaft position sensor. If the sensor is broken, it will not detect the rotation of the crankshaft, and the engine computer will not know that you are igniting, so it will not control it.

It may be that the battery is out of power, and the battery can only be replaced if the battery is out of power, which will generally occur after two or three years of battery use. If the battery is out of power, light it twice more and let the car's ignition system warm up, because the temperature is too low in winter. Hope to adopt!

Answer: The temperature of the battery is low in winter, the battery storage is insufficient, the positive and negative wires and binding posts of the battery are halogenated, and the nuts are loose. (Discharge method: use boiling water to slowly pour the halogen, it is easy to drop the halogen, then apply butter to the binding post, tighten the nut on the line, there will be no halogen in the future, if you can not let the starter rotate smoothly, you should replace the battery.)

It is recommended to use iridium spark plugs for spark plugs, which are durable and of stable quality. Remove carbon deposits from the spark plugs and adjust the gap between the spark plugs a little smaller than in the summer between 0:7.

Some of the above tips hope to make it easier for you to start your vehicle on fire in winter, so as to avoid affecting your life and work, and I wish you a safe journey!

The weather is cold, and the car does not catch fire, there are several reasons, the first one. The water tank was frozen, and the battery of the second car was out of battery for the third. The car ran out of gas.

First of all, the first one: spark plug, spark plug is a key component in the car ignition system, and the vehicle ignition system is the key to the car heart does not work, so whether the spark plug can work normally, related to the working performance and efficiency of the vehicle, emergency method: the spark plug can be wrung out and wiped clean, and the car can be loaded after installation.

The second: the battery is insufficient. The car does not catch fire, most likely because the battery is not running out of power.

In winter, this situation is more likely to occur due to cold weather than in other seasons. When the battery is low, the speed is weak when starting the car, and only a clicking sound is heard, but it just can't be hit. At this time, you can try to refuel the car when you twist the key, step on the accelerator continuously, and when the car shakes and is about to start, release the accelerator to see if you can hit the vehicle.

However, it is not possible to ignite continuously to avoid the battery running out. The service life of the battery is generally 1 and a half to 3 years, but it is recommended to go to the 4S store to check it before the winter comes. In winter, if you park for a week, you need to drive the vehicle out for a lap to effectively replenish the battery power.

Third: the exhaust pipe freezes or the valve deposits too much carbon. When driving, the engine is doing internal combustion movement, and water vapor will be produced after internal combustion, which will cause condensation in a certain part, if it does not melt for a long time, then it is of course difficult for the car to start, at this time, the car should be run at high speed to exhaust the water in the exhaust pipe.

In addition, excessive carbon deposition on the valve is easy to clog the throttle, so it is recommended to clean the throttle regularly. Fourth: the location where the car is parked.

Try to park the vehicle in an indoor garage to prevent a large amount of cold air from entering and lowering the temperature. When parking during the day, park on the sunny side. Starting the engine at low temperature will cause the wear of parts to be relatively accelerated, which will have a great impact on the life of the engine.

The engine is the heart of the car, once damaged, some waste oil, shaking problems come out.

1. The car battery loses power.

In the cold environment, the oil viscosity is high, and the atomization effect of the injector is not good, so it is difficult to succeed in the first few ignitions, because the car battery is in a cold environment, it is easy to lose power, so as long as the ignition is several times, the battery can no longer continue to supply power to ignite, and the car battery loses power, so it is necessary to ignite the vehicle.

Second, the spark plug is covered by carbon deposits.

When the car is running, carbon deposits will be generated, and too much carbon in the cylinder will affect the engine performance, because the spark plug is also in the cylinder, so the spark plug will be covered with carbon deposits. The mixed gas of the car is ignited by the spark plug, if the spark plug is covered by carbon deposits, the electric breakdown effect is weakened, which will cause the mixed gas to not be ignited, so when the weather is cold and the car can not start, the owner can replace the spark plug.

Third, the car antifreeze is frozen.

Antifreeze is antifreeze, but the owner has not replaced the antifreeze for a long time, then the antifreeze will deteriorate, so that the weather is too cold will freeze, the antifreeze will freeze, then the car can not start, and the forced start is easy to damage the engine. The antifreeze freezes and the vehicle needs to be thawed in the warm storage room and replaced with the antifreeze before the vehicle can be started.

There are two possible scenarios for failure to ignite: low-voltage circuit failure and high-voltage circuit failure.

1) Common faults in low-voltage circuits: insufficient storage of power in the storage BAI battery; Poor or deranged wire connections; Poor battery tie-up; Damage to the distributor or Hall sensor; Damaged ignition switch or poor wiring; The transistor ignition control unit is damaged or poorly wired. Most of the diagnostic methods for low-voltage circuit faults use ammeter or voltmeter to check the fault line by line to eliminate the fault point.

2) Common faults of high-voltage circuits: high-voltage lines fall off or leakage; Breakage and breakdown of distributor cover; Ablation, rupture, breakdown of distributor fire head; The spark plug electrode gap is too large or too small; Excessive carbon deposits in the spark plug; The spark plug insulator is damaged.

The ignition coil is damaged or the wiring is falling off. Most of the faults of high-voltage circuits adopt the high-voltage fire test method, that is, the high-voltage line in the center of the distributor or the high-voltage line of a cylinder is unplugged, and the wire head is placed at a distance of 3-6mm from the cylinder block, and the engine is started to test the fire. If there is a spark and the spark is strong, it means that the ignition system is working normally

This is fine, but make sure that the coolant of the car is not icing. The weather is too cold, the cylinder is too cold, and the spark plug is too cold, resulting in the inability to produce **, so it cannot ignite.

An easy way to dig is to take a ball of cloth, dip it in a little gasoline, light it in front of the air intake, and start the car. At this point, the engine draws the hot air in front of the air intake into the cylinder, and the car is much easier. In addition, the sound of the belt is also the reason for the cold of the car.

If it keeps ringing, it's time to check.

Expand the bucket material:

Reasons why the car won't catch fire:

1. If the car does not catch fire, first consider the battery power. Due to the falling of the battery plates, or the pH balance of the ratio is incorrect, the battery storage is insufficient.

2. The exhaust pipe is frozen or the valve has too much carbon. The main reason for the exhaust pipe freezing is that the frequency of use of the car is too low, and the water vapor after the combustion of the engine is frozen on some parts of the exhaust pipe. Over time, it can have a significant impact on the start and exhaust of the car.

3. Carbon deposits. It is easy to produce carbon deposits when driving at low temperatures for a long time, the quality of gasoline is too poor or the car is used for too long, and the engine oil is burned.

4. The flow of engine oil is blocked. In winter, the viscosity of the engine oil increases, and the oil does not flow smoothly, so the engine resistance increases, which makes it difficult for the car to start coldly in winter, and this phenomenon is more pronounced in northern cities. You can put the car in a warm environment, and the car can start normally after a while.

It is related to the density of the air, and the temperature of the air, the temperature is low, the mixture of air and fuel is poor, the air temperature in the cylinder when compressed cannot reach the necessary temperature when starting, and the pressure of the compressed air in the cylinder is also significantly lower than the pressure required for normal starting, and it is difficult to start.

The reason for the difficulty in starting is that when the temperature is below minus 25, the viscosity of the engine oil increases, and if the engine oil is not replaced in 0w winter, the mechanical resistance to start is large; In the case of low temperature, the fuel has poor volatility, poor combustion, and long-term short-distance driving, the water temperature cannot rise, resulting in more carbon deposits;

When the vehicle is parked outdoors in the cold for a long time, when the battery power is insufficient, the low temperature causes the battery activity to decrease, and the output power is insufficient.

1. The flow of engine oil is blocked, change the appropriate oil.

In winter, the viscosity of the oil increases, making it difficult for the oil to flow, which increases the resistance of the engine. The emergency solution is to put the car in a warm environment, and after a period of time, it can be started in a dull spring. However, the first car network Xiao I suggests that the owner should do a maintenance for the car and change the appropriate oil.

2. The amount of battery cover is insufficient, and it should be replenished in a timely and effective manner.

Battery drain or expiration of battery life is the most common. When the battery is low and the startup speed is weak, only the sound of the card can be heard, and then the sound of the card will gradually turn into a roaring sound.

When the car is refueling, try to turn the key, keep pressing the accelerator pedal, when the car is shaking and about to start, release the accelerator pedal, you can avoid damage to the car due to pressing the accelerator pedal hard.

Avoid continuous ignition to avoid draining the battery. The service life of the battery is generally one and a half to three years, and it should be replaced in time after this period. In winter, if you park for a week, you will go out and drive around, so that the battery can be effectively replenished.

Extended family resistance data:

Winter car maintenance precautions:

1. In addition to the normal battery life, unscientific cars will also aggravate the loss of the battery. Car owners should extend the life of the battery by developing good usage habits.

2. Park for a week in winter and drive out for a circle, so that the battery can be effectively replenished.

3. The effect of idle charging is generally poor, so it is not recommended to supplement with idle charging.

4. It is also conducive to the lubrication protection of automobile engine oil and the reduction of engine oil carbon deposition during driving. In addition, do not continue to listen after extinguishing the fire, hoisting glass windows, etc.