Fuel consumption is inexplicably high? It could be that something is wrong with these four places!

FYI, 1. Sensor failure; 2. The quality of gasoline is not up to standard; 3. The air leakage of the inlet pipe leads to the mixture being too thin; 4. The fuel pressure is low, and the injector and fuel filter are blocked; 5. The signal of the pressure sensor and the throttle position sensor is abnormal; 6. The ignition timing is inaccurate and the ignition is too late. 7. Weak high-voltage sparks due to poor spark plugs, igniters or high-voltage wires; 8. The throttle is dirty; 9. The exhaust gas recirculation system works poorly; 10. The exhaust pipe is blocked; 11. The cylinder pressure is low; 12. Turbocharging system failure 13. Clutch three-piece set 14 Air filter blockage, piston ring break or stuck, poor valve sealing, late ignition time, carburetor mechanical failure, air intake pipe leakage, individual cylinders do not work well or do not work, etc. However, some of the faults of insufficient engine power can be solved by use. Such as:

General wear of the cylinder, poor flow of the carburetor oil passage, etc. When the user reflects that the engine power is insufficient, when the oil is burned, we should first judge the cause of the lack of power, in the exclusion of the air filter blockage, the carburetor throttle can not be fully opened, the ignition timing is not good, the intake pipe gasket is damaged, the individual cylinder does not work or does not work well, and then according to whether the engine fuel consumption is too high to judge the carburetor working condition, if the fuel consumption is too high, the exhaust smoke is very thick, it is likely that there is a mechanical failure such as the volume hole falling off, this fault must be repaired as necessary. Finally, we have to judge the wear and tear of the engine cylinders.

Engine wear directly affects the tightness of the cylinder; Therefore, checking the tightness of the cylinder can largely reflect the degree of wear of the cylinder, and the most convenient way to check the tightness of the cylinder is to use the cylinder pressure gauge to check the compression pressure of the cylinder.

There are generally several reasons why the car suddenly becomes high in fuel consumption:

1. Serious carbon deposition; Poor oil quality, or frequent use of fuel treasure, will lead to increased carbon deposits inside the engine. Excessive carbon build-up can lead to rough interiors in the intake manifold, affecting the amount of air intake and the effect of the mixture. If you feel that the fuel consumption of the vehicle is increasing at the same time, and the travel hunger is accompanied by a decrease in power, acceleration and shaking, etc., it may be that there is too much carbon deposit and needs to be cleaned up;

2. Ignition system; High-pressure ladle and spark plug are one of the common faults, and the failure of the high-pressure ladle will cause the ignition system to not work, resulting in lack of cylinder, decreased power, and increased fuel consumption. Spark plugs are also wearing parts, and if they are not replaced for a long time, they will lead to a decrease in point or performance, and the fuel combustion is incomplete, so the spark plugs should be replaced regularly;

3. Maintenance problems; Too much oil, poor quality, too high viscosity or not replaced on time are the key factors affecting the operation of the engine. In addition, if the air filter is too dirty, it will block the air intake, which will increase the air intake resistance, reduce the power, and increase the fuel consumption;

4. an oxygen sensor; The oxygen sensor is located in the exhaust pipe of the vehicle, which is a ceramic element that detects and controls the ratio of oxygen to fuel, and the oxygen sensor controls the fuel injection system by monitoring the exhaust gas. If the oxygen sensor fails, it will affect the fuel supply, and the fuel consumption will directly increase significantly, so it is necessary to check whether the oxygen sensor is damaged;

5. mechanical parts; If the vehicle is relatively old, there may be problems such as serious wear of the cylinder wall and poor valve sealing, which will cause insufficient cylinder pressure, and the car will cause the vehicle power to decrease and the energy consumption to rise. In addition, severe clutch wear can also cause the engine to lose spin, affecting the entire transmission system, thus making the car"Just calling can't leave"；

6. Tire problems; Uneven tire wear, serious wear, and inaccurate four-wheel alignment will lead to greater driving resistance, resulting in increased fuel consumption. The tire pressure should also be appropriate, if the tire pressure is insufficient, it should be inflated in time to reduce fuel consumption and ensure the service life of the tire.

Under normal circumstances, fuel consumption will not increase much even if it increases due to changes in driving habits and driving conditions. If the fuel consumption of the vehicle suddenly increases by a few gas, then the vehicle can be judged to be faulty.

There are many factors that contribute to the abnormally high fuel consumption, including dirty throttle valves, old spark plugs, and serious carbon deposits.

If the vehicle is not maintained for a long time, the oil and air cleaner will become dirty, which will also lead to increased fuel consumption. When the oil is dirty, it will be poorly lubricated, resulting in an increase in the resistance of various moving parts of the engine, and more energy is needed to overcome the resistance, and fuel consumption will increase.

Fuel injectors, spark plugs, engine oil, driving habits, weather season, gasoline quality.

Insufficient tire pressure and tire wear. If the tire pressure is insufficient or too low, the friction between the tire and the ground will increase, and the drag will increase, and the fuel consumption will increase. If the tires are severely worn, they will often slip and fuel consumption will also increase.

2. Pay attention to the quality of refueling and clean up carbon deposits regularly. Poor quality gasoline will increase carbon deposits, and excessive carbon deposits will make the intake pipe wall rough, affecting the air intake effect and the quality of the mixture, and causing fuel consumption to rise sharply. Therefore, the quality of gasoline cannot be ignored, and it is essential to clean up carbon deposits every six months.

First of all, we need to understand that when there is a sudden increase in fuel consumption, the fuel consumption value displayed on the dashboard is most likely instantaneous. Many people may not know much about instantaneous fuel consumption, which refers to the fuel consumption of a vehicle at a certain moment. When you drive and press the accelerator pedal to overtake, the fuel consumption of the car will indeed soar to a very high level in an instant, and even the fuel consumption of some cars will go to more than 20 in an instant.

In fact, observing the instantaneous fuel consumption is of great significance to understand the fuel consumption of the engine in different situations. For example, you can look at instantaneous fuel consumption to understand fuel consumption when the vehicle is stopped and the engine is idling.

Through instantaneous fuel consumption, you can understand the fuel consumption of 100 kilometers at different speeds, so as to find the economic speed of the vehicle; Some vehicles that use computer control fuel injection can observe that the fuel consumption of the vehicle is "0" when coasting in gear through instantaneous fuel consumption

Under normal circumstances, if the fuel consumption of the car suddenly increases, and the power also decreases slightly, then it is likely that the carbon deposition of the vehicle increases, which is more serious, such as the intake and exhaust, the oil circuit, the fuel injector, the throttle and other places have serious carbon deposition.

Faulty vehicle oxygen sensor.

The most important function of this component is to monitor the oil-gas ratio of the engine, which is a supervisor to supervise whether the engine is mixed with gasoline and air in the correct ratio during operation.

There is a problem with the spark plug.

If the engine is the "heart" of the car, then the spark plug is equivalent to the "pacemaker" with the help of the spark plug, the combustion of gasoline and air can be more sufficient, and the engine can maintain a continuous and powerful state.

Keep your tire pressure normal.

The normal tire pressure value should not be too low or too high, too low will increase the contact surface between the tire and the ground, the friction will become larger, the fuel consumption will definitely increase, and there will be a danger of "out of the circle" for a long time, too high will affect the comfort, and at the same time increase the probability of high temperature puncture in summer.

This should happen in the case of a sudden increase in fuel consumption, but in most cases, as long as you have no problem with your driving habits, fuel consumption will not rise suddenly.

If the car walks in the city, the fuel consumption is increased. Because the car stops and goes, unlike at high speeds, it is very fuel-efficient. If the fuel consumption is excessive, it is advisable to check the engine at the car repair shop.

In the process of using the car, if it is not maintained in time due to improper operation or timely maintenance, there may be a sudden increase in fuel consumption.

Some have experienced a sudden increase in fuel consumption. In winter, fuel consumption is higher than in summer, and sometimes if there is a traffic jam, the fuel consumption will also increase.

If you are talking about the increase in fuel consumption, this is a very normal thing, if your car is not regularly maintained, some of its functional aspects will increase this burden, will increase fuel consumption.

Probably because one part of the car is at fault, and that's the spark plug. The spark plug acts as a hub to power the car, if the spark plug is blocked.

This is a relatively rare situation, because of the machine or some other external reasons caused by the problem.

The increase in fuel consumption is mostly related to the car owner's use of the car. There are generally several reasons for this:

If the tire pressure is insufficient, if you find that the coasting distance of the car is reduced.

Tire wear, if the tire wear is severe, it will occur frequently.

You can check if there is a problem with your spark plugs, or if the tire pressure is too low and the wear is severe.

In the first case, it is caused by the failure to match the control unit of the engine after cleaning the throttle valve or the matching is not successful.

In the second case, the engine electronic control system is faulty, resulting in the mixture being too thick, and how to increase fuel consumption.

In the third case, the ignition coil or spark plug of the engine is damaged, and the fuel injector leaks, resulting in increased fuel consumption.

In the fourth case, the engine cooling system fails, causing the engine temperature to be too low and it is always in a warm-up state.

In the fifth case, the engine deposits too much carbon, resulting in insufficient combustion.

In the sixth case, the fuel tank ventilation system fails, resulting in a leakage of fuel vapor.

The above are just six common reasons, and there are many situations that can lead to a sudden increase in fuel consumption, so I won't list them all here.

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When it comes to the improvement of car fuel consumption, the first reaction of most drivers is that there is a problem with the ignition system or fuel injection system, because these two systems are directly related to fuel consumption. The fuel injector is responsible for injecting oil to atomize the combustible mixture, and the spark plug is responsible for igniting the combustible mixture. These two parts are controlled according to the driving computer, and the two parts will not be damaged under normal circumstances!

Unless the driver intentionally extends the spark plug replacement interval, it will lead to a spark plug misfire. The spark plug works for a long time in a continuous high temperature environment, due to high temperature oxidation, the electrode slowly loses its sharp angle and passivation, and then the spark plug gap slowly increases, resulting in an increase in breakdown voltage, which is easy to cause fire failure, resulting in insufficient combustion in the cylinder, which directly leads to the increase of fuel consumption, so the spark plug has to be replaced regularly.

The transmission system is poorly lubricated, consumes a lot of energy, and increases fuel consumptionThere is a problem with the brakes, the brakes are aging and the return is poor, which leads to the grinding of the brake pads and brake discs and brake drums, and eventually increases the fuel consumptionIn short, if you encounter a sudden increase in fuel consumption, you can start from driving habits, road conditions, tire pressure, etc., if you confirm that these external reasons are ruled out, then you have to wonder if the car itself is faulty, then it is best to go to the 4S shop or repair shop for maintenance

The root cause of the sudden increase in fuel consumption of a car is that when the car is underpowered, it inadvertently increases the throttle, and the fuel consumption increases when there is no increase in effect.

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1.Carbon 2There is a problem with the sensor3Bad driving habits.

Reasons for the abnormal increase in fuel consumption: 1. If it is found that the vehicle returns to the side during the driving time and the coasting distance is significantly shortened, the tire pressure should be checked to see if it meets the air pressure standard. If the tires are underinflated, fuel consumption will also increase.

Replace tires with new ones if necessary; 3. If abnormal noise is found in the wheel during driving or starting, the bearing and braking system should be checked in time for failure. If the wheels rotate abnormally, it will affect the speed of the vehicle and increase fuel consumption.

Reasons for the abnormally high fuel consumption:

1. If you find that the sliding distance of the vehicle is significantly shortened during driving time, you should check whether the tire pressure meets the air pressure standard. If the tires are underinflated, fuel consumption will also increase. Tip: Adequately inflate your tires at the right time;

3. If abnormal noise is found in the wheel during driving or starting, the bearing and braking system should be checked in time for failure. If the wheels rotate abnormally, it will affect the speed of the vehicle and increase fuel consumption.

1. The tire pressure is too low.

The tire pressure is too low, just like a bicycle can't pedal when it's out of air, and so is a car. This will not only lead to an increase in fuel consumption, but also have many safety risks, especially when running at high speeds, tire pressure is too low and it is easy to get a puncture.

2. The air filter element is blocked.

You can also replace the air filter, the air filter will not be cleaned for a long time will produce dust, resulting in insufficient air intake of the engine and fuel can not be fully combusted, which will lead to increased fuel consumption, and in serious cases, it will also affect the life of the engine.

3. Engine carbon deposits.

After the car has been driven for a long time, the engine will more or less produce some carbon deposits, especially in some road sections that are often congested, and frequent low-speed driving can easily lead to too much carbon deposits in the engine. Excessive carbon deposition in the engine will lead to insufficient engine power and increased fuel consumption, so you can also check the carbon deposition of the engine.

4. Spark plug aging.

The average car travels 50,000 kilometers, and the spark plug almost needs to be replaced. The aging of the spark plug leads to the weakening of the ignition and the lack of power, and when driving, in order to provide enough power to the car, the car must provide more raw materials, resulting in an increase in fuel consumption.