What is the reason for the lack of engine power?

The reason for the lack of power is that it can be divided into engine part and mechanical part, for reference only: 1. Oxygen 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 failure.

Detect these 10 points, and the problem can generally be eliminated.

1.Perform fault self-diagnosis and check whether there are fault codes.

2.Press the accelerator pedal all the way down to check if the throttle is fully open.

3.Check the air filter for blockages.

4.Check the ignition timing with the ignition timing lamp.

5.Check for obvious cylinder shortages. It can be used for single-cylinder fire failure and oil end experiment.

6.Inspect all spark plugs, high-voltage wires, ignition coils.

7.Check the fuel pressure, disassemble the injectors, and check if the injection volume is normal.

8.Detect air flow meter, throttle position sensor, crankshaft position sensor, camshaft position sensor, coolant humidity sensor, oxygen sensor, deflagration sensor signal. 9.Check whether the exhaust is unobstructed and whether the three-way catalytic converter is blocked.

10.Measure cylinder compression pressure, check valve and piston carbon deposits, disassemble and inspect the engine, etc.

Years of accumulated experience, I hope it will help you!

The common causes of insufficient engine power are: three-way catalytic converter blockage, poor atomization of fuel injector, weak ignition of spark plug, insufficient fuel pump oil supply, fuel filter blockage, ignition timing is inaccurate, etc.

Mine is self-comfort, 1500 kilometers, mainly highways, I feel that the power of Weiling is enough, not enough.... …

1. The intake and exhaust system is blocked.

Due to the dirty blockage of the three-way catalytic converter, the engine exhaust is not smooth, and then the engine power is insufficient, in this case, it is recommended to replace the air filter element with a new one or clean the three-way catalytic converter, if the cleaning is ineffective, replace the new three-way catalytic converter.

2. The fuel system is dirty and the fuel injector is damaged.

Due to the fuel filter, fuel pump filter, fuel injector is dirty and blocked, fuel pump is damaged, etc., resulting in low fuel pressure or poor atomization of fuel injection, it is recommended to replace the fuel filter element and clean the fuel injector. At the same time, the fuel system pressure, if the pressure is insufficient, replace the fuel pump with a new one.

3. Air leakage in the intercooler box.

The intercooler box and the water tank are adjacent to each other, and the two parts will interfere due to deformation and displacement for a long time, which is easy to cause air leakage and air pressure reduction due to wear and tear of the intercooler box. In this case, you should go to the designated service station of the main engine factory for maintenance, and replace the intercooler box if necessary. Usually the driver should often check the intercooler box, check the deformation and interference, and maintain it regularly.

It is generally caused by low fuel pressure, poor injector injection, low ignition high pressure or low energy, incorrect ignition timing, low cylinder compression pressure and blocked exhaust pipe. 1. Press the accelerator pedal to the end and check whether the throttle can be fully opened. If it can't be fully opened, adjust the throttle cable or pedal.

2. Check whether the air intake system is blocked or leaking. If the air intake system is clogged or leaking, it will inevitably affect the charging efficiency of the engine, resulting in a decrease in engine power and acceleration performance. Specifically, the air filter, air intake duct and various vacuum hoses should be inspected for blockages or air leaks.

3. Check whether the exhaust system is blocked. The back pressure of the exhaust system is generally controlled within one atmosphere, if the back pressure of the exhaust system is too large due to the blockage of the exhaust pipe, it will inevitably cause the residual exhaust gas content in the cylinder to increase, thereby causing the combustion rate of the mixture to decrease, and the effective pressure of the cylinder to decrease. The main reasons for the increase in the back pressure of the exhaust system are blocked exhaust pipes, deformation of the exhaust muffler or three-way catalytic converter, etc., and these components should be inspected.

4. Check whether the fuel supply of the fuel system is normal.

1. The air filter is blocked and the exhaust is blocked; 2. The filter is aging, causing debris to enter the fuel system; 3. The valve is sealed, and the gasoline and air are lost; 4. Excessive carbon deposition on the valve and piston or inside the cylinder block; 5. The plug is broken, resulting in the spark plug being unable to ignite; 6. The engine temperature is too high, the water pump and thermostat work poorly, the belt slips, and the cooling system has too much scale. ”

Hello, it takes time to type, please be patient and give you a reply right away [smile].

Hello, glad to answer for you. Weichai engine is not powered enough''1Fuel Supply System The fuel supply system is one place where cars are prone to problems.

Insufficient amount of fuel entering the combustion chamber will cause insufficient power, which may be caused by clogged fuel injectors, oil pipe leakage, clogged gasoline filters, and reduced power of the gasoline pump over time. 2.Air Intake System The engine of the car needs to run, in addition to fuel, it must also have air, otherwise the engine will not be able to run smoothly.

The possible causes of insufficient power in the car are dirty and clogged air filters or throttle systems; Inlet air temperature, inlet air pressure sensor is not working properly, air flow meter is malfunctioning, etc. If it's these. 3.

Gasoline The use of low-octane gasoline, the use of gasoline for too long, due to volatile deterioration resulting in too low octane number, easy to cause detonation, so that the engine power decreases. 4.Carbon deposition problems Carbon deposits in spark plugs and other parts increase fuel consumption.

I hope the above is helpful to you If you are satisfied with me, please give me a thumbs up

Mine is self-comfort, 1500 kilometers, mainly highways, I feel that the power of Weiling is enough, not enough.... …

the causes of the decrease in engine power; 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 original slag factors that affect the decline of engine power, especially in the case of insufficient tire pressure and a large number of passengers.

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 to be less powerful or weaker.

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.

There are several possibilities for insufficient engine power. If the ignition time is delayed, it is advisable to check the engine timing if the fuel pressure is insufficient or the fuel system is not clean or the fuel nozzle is damaged. It is recommended to replace the fuel filter, clean the fuel nozzles, and damage to the engine head gasket or valves.

It is recommended to go to a professional auto repair shop for repairs. The intake and exhaust systems are clogged. It is recommended to replace the air cleaner or three-way catalytic converter.

If the intake pressure sensor or ignition system part is damaged, it can be replaced. Insufficient engine power fault and its solution.

The delay in the ignition time of the engine can easily lead to engine heating, high water temperature, and slow refueling. This is mainly due to timing belt skipping teeth or engine maintenance operation errors. Just check the engine timing again.

If the vehicle is unable to accelerate and accelerates slowly, it is because the air filter and the catalytic converter are dirty or clogged. The air filter needs to be replaced with a new one and the three-way catalytic converter needs to be cleaned. If there is still no improvement after cleaning, replace it directly.

When the vehicle is moving, the acceleration is weak, and the idle speed is normal or low. This is due to a leak in the fuel system line, or a lack of pressure caused by a clogged or damaged fuel nozzle. The fuel filter can be replaced, the nipple can be cleaned, and if the fuel pressure is insufficient, the fuel pump can be replaced with a new one.

It is easy to run out of coolant, unstable at idling, easy to stall, difficult to start, high engine water temperature, and weak acceleration of the vehicle when driving. This is caused by a chronic shortage of engine coolant or when the vehicle is driving in a state of high water temperature of megaliquid, or it is possible that the valve is damaged. This one needs to be repaired by a professional repair shop.

The vehicle is moving, the acceleration is weak, the speed of refueling is slow, or the engine is turned off, or the vehicle cannot even be started. The intake pressure sensor is damaged, the spark plug is damaged, and the engine is not in good working condition. You can use the decoder to read the fault code and directly replace the relevant accessories.

The above is related to the reasons for the lack of engine power. Hope it helps you.

Millions of car purchase subsidies.

The causes of insufficient engine power include excessive carbon deposition in spark plugs, clogged air filters, worn connecting pipes in the air gas system, clogged fuel filters, and worn valves.

1. Excessive carbon deposition in the spark plug

As we all know, spark plugs are circuit elements. If the spark plug deposits too much carbon or is used for too long, it is likely that there will be a lack of power and engine shake as it ages. If it is serious, it will affect the normal start of the vehicle, which is a very serious problem.

2. The air filter is blocked

Clogged air filters lead to increased intake resistance and a decrease in the amount of air entering the cylinders, resulting in incomplete diesel combustion and insufficient engine power. Regardless of whether the air air filter is wet or dry, always clean the air filter or remove dust from the paper filter, replacing the filter if necessary to ensure the air air filter is clean.

3. The connecting pipe of the air gas system is worn

The supercharged diesel engine drives the turbine through the exhaust pressure to drive the pump wheel to rotate at high speed, and the compressed air gas is transported to the intake pipe. Ensure the power of the engine. Therefore, the intake and exhaust systems of turbocharged diesel engines must be completely sealed.

If the exhaust pipe or fitting leaks, the exhaust pressure will drop, the supercharger speed will drop, the engine intake pressure will drop, and the engine power will naturally decrease.

If the air intake system including the intake pipe, intercooler and various joints leaks, although the intake pressure provided by the supercharger meets the standard, the actual air volume entering the engine is obviously insufficient, which will reduce the engine power. This type of failure often occurs in new cars. After the new car runs for a period of time, the pipe expands when it is heated and shrinks when it is cold, and the joint is easy to loosen.

4. The fuel filter is blocked

The fuel filter is clogged with oil impurities, which increases the flow resistance of the fuel, reduces the amount of oil entering the high-pressure pump, and correspondingly reduces the amount of fuel injected into the cylinder, resulting in insufficient fuel engine output. Regularly inspect and clean the fuel filter element and replace it if necessary. When the fuel filter is driven for 10000-12000 km, it should be replaced to ensure that the fuel filter is clean.

5. Valve wear

After a long period of action and wear between the rocker arm of the engine and the valve, the gap will become larger and larger. If the gap is too large, the air intake will be insufficient. Valves are consumable parts that can be damaged over time.

The consequences of valve damage are extremely serious, and the damage factors are also diverse, sometimes implicating each other. In order to avoid premature damage to the valve and prolong its service life, it is necessary to carry out timely maintenance according to the requirements of the instruction manual of various types of vehicles.

1. The reason for the fuel supply system: the fuel quality is not good, the oil cleanliness and combustion rate are relatively low, and it is easy to have the problem of oil circuit failure, so that the engine does not operate normally;

2. The original ignition of the ignition system: premature ignition causes premature ignition and detonation of the combustible mixture, which causes the reversal of the engine of pure knowledge, which reduces the power and ignition too late, which will cause the combustible mixture to burn sluggishly in the combustion chamber, and the engine to overheat and the power to decrease;

3. The compression pressure of the cylinder: the power output is formed between gasoline and air to form a mixture of gas to produce power, and the insufficient air intake will cause serious wear and tear of the cylinder, resulting in an increase in the matching gap between the piston, piston ring and the cylinder, resulting in the leakage of the cylinder head, and the power output will be insufficient;

4. Engine overheating: too much or too little lubricating oil in the crankcase, deterioration or dirt of lubricating oil, and blockage of lubricating oil channels will directly affect the power of the engine.