What is the reason why the car runs in the city and the fuel consumption is high? 10

Causes of high fuel consumption in automobiles and how to solve them:

1. Reason for high fuel consumption of automobiles: tires. Tires are easier to inspect, so you should check your tires first.

If the tire pressure is insufficient, the fuel consumption will increase. If there is no problem with the air pressure, then check the degree of wear and tear of the tires, when the tires are severely worn, there will often be signs of slippage, which will also increase fuel consumption.

2. The second reason for the high fuel consumption of the car: the engine. If the engine deposits carbon in the short term.

More, it will also cause high fuel consumption of the car, which is likely to be the use of substandard oil. The solution is to add a certain amount of detergent when refueling, if the effect is not obvious, it means that the engine is in the volume.

There is a lot of charcoal, so this situation has to be handed over to the 4S shop or maintenance shop, and the technician will clean the carbon deposit in the engine.

3. The third reason for the high fuel consumption of automobiles: oxygen sensor.

As an internal control unit of the car, the oxygen sensor is mainly used to monitor the engine oil and gas ratio, once damaged, it will cause the engine oil and gas ratio to be out of balance, and the fuel consumption will inevitably increase abnormally, after the oxygen sensor is damaged. When the vehicle is driving, the exhaust pipe will exhaust a darker exhaust fume. At this time, the oxygen sensor should be replaced as soon as possible.

4. Reason 4 for high fuel consumption of automobiles: a control unit of the engine. Although the engine's electronic control unit is highly reliable, it is inevitable that it will fail in those cars that have been used for a long time.

If one of the control units fails, it is likely to increase fuel consumption, accompanied by poor dynamics and dark exhaust gases.

1. Excessive carbon deposition in the engine: excessive carbon deposition in the valve and intake pipe is the most common reason for the decline of engine power.

Solution: Find a professional auto repair personnel to help clean up the carbon deposit, and check whether the spark plug needs to be replaced.

2. The fuel supply system is not smooth: check the fuel supply system, whether there is blockage or gas resistance in the fuel pipeline, whether the gasoline pump is working normally, whether the oil level height of the carburetor float chamber meets the specified requirements, whether the air filter is blocked, whether the exhaust system is blocked, etc.

Solution: It is recommended to dredge the fuel supply system.

3. Poor tire pressure of automobiles: Poor tire pressure is also one of the reasons for the decline of engine power, especially when the tire pressure is insufficient and the number of people is large.

Solution: Therefore, when the tire is inflated, it must be filled enough, and it should be filled according to the tire pressure gauge marked on the body.

4. Air filter blockage: air is one of the power of the engine, if the air filter is not cleaned in time for a long time, the lack of air volume will cause the combustible mixture to be too thick, so that the engine power will decrease; In the case of a vehicle with a turbocharger, the failure of the supercharger will also cause the engine power to be reduced or weakened.

Solution: It is recommended to clean the air filter.

5. In addition, the efficiency of the spark plug is reduced and the water temperature is too high; There was a knock in the cylinder; Reasons such as excessive oil temperature in the engine can also affect engine power.

Solution: It is recommended to go to a professional repair station for inspection and repair.

6. The car is added to the gasoline of poor quality (such as too many impurities such as mixture), which is also the reason for this failure in many cars, whether it is a new car or an old car. Because there are too many impurities in the gasoline composition, it is easy to cause the generation of carbon deposits, and it will also affect the blockage of the oil circuit, thereby causing the power to decline due to the unsmooth oil supply.

7. The working principle of the throttle valve is to control the air intake volume of the engine, and its opening angle has a standard value, if it does not reach this standard value, it will affect the abnormal amount of fuel injection, resulting in power decline or power instability.

Solution: It is recommended to clean the throttle valve by the way when carrying out car maintenance, and check whether the air filter needs to be replaced;

8. The function of the belt is to drive the engine, compressor, generator, and water pump to run the transmission, if the belt is aging and there is a phenomenon such as slippage or cracks, it will directly affect the power of the car.

Solution: During maintenance, you should also call the maintenance master to help check whether the belt is good.

Excessive carbon deposition in the engine will cause poor oil circuit to make fuel consumption high, sometimes I have heard that many new cars have high fuel consumption may be caused by the use of unsuitable oil; The old car should be cleaned regularly. However, there may be many reasons for the problem of fuel consumption. Like before, my car checked several shops and couldn't find out that ** is wrong, and finally a master in the sunshine craftsman said that there was a problem with the carbon tube, and the fuel consumption dropped after changing.

Try to reduce the load weight of the car, try to avoid rapid acceleration and floor oil, and do not hit the accelerator or frequently step on the brakes; Pay attention to the maintenance of the car, there are many reasons, like when I was maintaining the sunshine craftsman downstairs a while ago, the master asked me if I didn't think the fuel consumption was high recently, because the tires were not inflated enough. . . Therefore, it is better to check the specific reasons for specific treatment.

The reason for high fuel consumption is first of all caused by poor driving habits. Personal driving habits have a big impact on fuel consumption. Due to the mechanical design.

and other factors, the engine needs to run for a period of time to achieve the best running effect! Move and refuel, minimizing the driving habit of putting one foot on the accelerator and the other on the brakes. Generally speaking, 60-90 kilometers per hour is the most economical speed.

At high speed, do not exceed 100 metric miles of silver, fuel consumption will be very good.

The second reason is:Car enginescondition and excessive tire pressure。Abnormal ignition system of the engine also has a great impact on fuel consumption, such as inaccurate ignition time and high-voltage lines.

Leakage, spark plugs.

Carbon deposits lead to poor ignition, etc., which will reduce the combustion efficiency of the car. engine and increase fuel consumption. There is also the maintenance of the engine. According to statistics, it is normal for a poorly maintained engine to increase fuel consumption by 10% or 20%. If the air filter.

Too dirty, it may also increase fuel consumption by 10%. To maintain the optimal performance of your car, it is best to change the oil and check the filter every 5000 km.

If you don't change the oil and air filter for a long time, it will also lead to an increase in fuel consumption. If the oil is not changed for a long time, it will lead to poor lubrication, which will increase the resistance of the movement of engine components, and more resistance needs to be overcome, which will significantly increase fuel consumption. If the air filter is too dirty, it will lead to poor air intake, and the engine will consume more energy when inhaling; In addition, insufficient air intake will also lead to insufficient combustion, and some gasoline will not burn or form carbon deposits, which will also increase fuel consumption by bending the bridge.

To know that when driving, you must first understand the current road conditions, and what kind of road conditions determine what kind of driving style. Other motor vehicles on the road, non-motor vehicles.

Pedestrians, road conditions, etc., depending on the road conditions, the driving style is also different. The city test consists of four identical cycles, each consisting of a series of acceleration, steady speed, deceleration, and idling.

Compose. The maximum speed of each cycle is 50 km h, the average speed is 19 km h, the test time is 195s, and the mileage of the four loops is about 4 km.

This may be because your car has a very large displacement, and then pretend to be and your driving habits are not good, always slamming on the accelerator, or slamming on the brakes to return to Kai or frequently stepping on the accelerator, frequently stepping on the brakes, and turning on the air conditioner, fuel consumption is not usually large.

Due to the inter-city driving in Pitan Cave, the traffic flow is large, the state of the car is unstable, and when there is a vehicle in front or a passer-by in front, you need to step on the brakes, and there will be idling and waiting for the red light to burn the core, which will increase fuel consumption.

This situation is caused by a problem with your driving habits, always pressing the accelerator, and the fuel consumption will definitely be high.

The following are the reasons for the high fuel consumption of automobiles: 1. Affected by temperature: resulting in fluctuations in fuel consumption in winter, low temperature and low fuel consumption will increase.

2. The vehicle has not been maintained for a long time: the oil and air filter will also lead to an increase in fuel consumption. Dirty oil leads to poor lubrication, resulting in increased resistance of various moving parts of the engine, requiring more energy to overcome resistance, and increasing fuel consumption.

3. Insufficient air pressure: insufficient air pressure will lead to a larger contact area between the tire and the ground, and greater friction, that is, a larger driving resistance, and higher fuel consumption. 4. Excessive carbon deposition in vehicles:

Where there is carbon deposit, it is the throttle, fuel injector, air intake, and piston top, any place where too much carbon is deposited, which will lead to incomplete combustion, which will lead to increased fuel consumption.

1. Check tire pressure and tire wear frequently.

If the tire pressure is too low, the friction between the tire and the ground will increase, and the drag will increase, and the fuel consumption will increase. If you find that the gliding distance of the car is significantly reduced, you should check whether the air pressure of the tires meets the air pressure standard. The normal tire pressure is around the right, and it can be appropriately reduced in summer.

Also remember to check the degree of wear and tear of the tires, if the tires are seriously worn, there will be frequent skidding, fuel consumption will also increase, generally every 50,000 kilometers, you must go to a new set of tires.

2. Pay attention to oil products and clean up carbon deposits.

Many car owners do not pay attention to the oil products, poor quality gasoline will increase carbon deposits, too much carbon deposits will make the intake pipe wall rough, affect the air intake effect and the quality of the mixture, so that fuel consumption rises sharply.

Therefore, the quality of gasoline cannot be ignored, and it is essential to clean up carbon deposits every six months.

3. Replace the oxygen sensor at 8-110,000 kilometers.

This is a ceramic element located on the exhaust pipe of the engine that detects and controls the ratio of oxygen to fuel. After a long period of use, the computer of the electronic fuel injection system cannot obtain information about the oxygen concentration in the exhaust pipe, and the mixture concentration in the engine tends to be high, and the fuel consumption will also increase.

Therefore, it is necessary to check the condition of the oxygen sensor regularly, and it usually needs to be replaced at 8-110,000 kilometers.

4. Replace the spark plug regularly.

The function of the spark plug is to generate an electric spark with high voltage electricity to ignite the mixture. If damaged, the ignition energy will decrease, and the mixture will burn unevenly, resulting in a slowdown in the speed of the car and an increase in fuel consumption.

The life of ordinary spark plugs is only 3-50,000 kilometers, the life of iridium spark plugs is about 5-80,000 kilometers, and the life of platinum spark plugs can reach 100,000 kilometers!

5. Replace the battery regularly.

The battery controls the circuitry in the car, and the circuit is closely related to the oil circuit. Because the general battery will be used for 2-3 years, there will be a loss of power, resulting in insufficient starting voltage, the motor drives the engine weakly, so that the ignition energy becomes low, and the fuel consumption soars.

So don't think that the battery can continue to be used if it is not broken, and the battery must be replaced regularly if you want to reduce fuel consumption.

Hello question. I am 13 new Shengda four-wheel drive.

Recently, there has been a sudden increase in fuel consumption.

If you want to answer the question of a sudden increase in fuel consumption of a car, first consider the failure of the engine control system. First of all, consider the ignition system failure, which mainly includes the ignition coil and spark plug. The second aspect is to consider the failure of the common fuel injection system, one is to consider the fuel injector, and the other is to consider the problem of the gasoline pump.

The third point is to consider the sensors, especially the intake flow sensor and the oxygen sensor.

You can first perform a computer test to see if there is a fault code in the system.

If there is no fault code, focus on the injector spark plug.

Secondly, cooperate with the computer to read the data stream to see if the data of each sensor is within the normal range.

There are no fault codes for asking questions.

The spark plug was replaced.

Answer: Has the carbon deposit on the throttle injector been cleaned? If the ignition coil of Huasai has been replaced, it is recommended to check the fuel supply pressure, including the fuel injector, to see if it is normal, if there is a fault, including the gasoline pump, it will also lead to a sharp increase in fuel consumption.

Question: The throttle valve was also cleaned.

1. Carbon deposition in the engine, long-term operation of the car, gasoline in the combustion process, will inevitably produce carbon deposition and sludge, these sludge and carbon deposition if not cleaned in time, will lead to an increase in automobile fuel consumption.

2. If the spark plug fails, the function of the automobile spark plug is to use high-voltage electricity to generate electric sparks to ignite the mixture. If the damage will reduce the ignition energy and the mixture will burn unevenly, it will cause the car to slow down and increase fuel consumption.

3. Abnormal tire pressure and abnormal pressure of automobile tires will also have an impact on the fuel consumption of the car. When the tire pressure is too low or the tread is seriously worn, the contact area between the tire and the road surface becomes larger, the friction increases, the rolling resistance increases, and the fuel consumption naturally increases.

4. If the car is loaded for a long time, the weight of the vehicle with too much load will increase, the driving pressure of the car will also increase, and the fuel consumption of the car will also increase.

5. The atomization effect of the fuel injector is not good, and this situation may be that the car fuel injector is blocked, which will greatly affect the effect of the car fuel injector, which will also lead to an increase in car fuel consumption.

6. The failure of the car sensor is also the main reason for the increase in fuel consumption of the car, when the water temperature sensor fails, the engine mistakenly thinks that the car belongs to the cold state, and will always transmit the information of fuel injection, resulting in the increase of fuel consumption of the car.