Have you ever found that there is an abnormal sound when you press the throttle lightly?

The sound you describe should be the sound of the engine calling. For this sound, the professional name is called "detonation". The main reason for the formation is that there is carbon deposit on the top of the piston, because the carbon deposit forms a hot surface with high strength, at this time, the fuel mixture gas that enters the combustion chamber begins to spontaneously ignite because of the carbon deposit before the ignition stroke, although this combustion phenomenon seems to be sufficient, but this combustion is spontaneous combustion, premature ignition, there is no safety regulation in the stroke of combustion, there will be a metal sound of the piston and the cylinder wall impacting, that is, we often call the rod, that is, you describe it as a metal sound like a bunch of keys dragged on the ground.

It is recommended that you go to the 4S store as soon as possible for an inspection. It mainly checks whether there is too much carbon deposit inside the engine.

In this case, it is recommended to go to the repair shop to check the abnormal noise ** for maintenance, so as not to affect the overall safety performance of the vehicle.

If the vehicle presses the brakes normally and there is an abnormal noise, it is recommended to consider checking whether the brake pads are caused by obvious wear grooves.

Hello, if the car lightly steps on the accelerator and there is an abnormal noise, it should be caused by the problem of impressing, it is recommended to check it.

If this is the case for you, it is best to go to the 4S shop and ask the staff to do a systematic and comprehensive inspection of the vehicle.

In this case, it is recommended to go to the 4S shop to check the engine pulley, as well as the abnormal noise caused by the tensioner.

Hello, if you find that the engine has abnormal noise, it is recommended to go to the 4S shop or repair shop to check that there is a problem, generally stepping on the accelerator has the sound of most of the parts, belts, tensioners, valves, needle valves and other components.

If you are pressing the throttle lightly, it is recommended to check the belt tensioner valve of your engine first.

Hello, for the car, if there is an abnormal noise when you press the accelerator lightly, it is likely to be caused by the slippage of the engine belt, which still needs to go to the repair shop to check to be sure, it is recommended that you go to the repair shop to check it.

If there is an abnormal sound when you step on the accelerator, it is definitely abnormal, and it is recommended that you can go to the four S store to check it for free during the warranty period.

There is an abnormal sound when the car steps on the accelerator and loosens the accelerator, and how to solve the problem is shared with you.

1. Abnormal noise of gasoline pump motor. When there is wear or impurities inside the motor of the gasoline pump, it will make an abnormal noise as we step on the accelerator. Zheng Liang had this kind of problem and needed to replace the gasoline pump.

2. Abnormal sound of the throttle. Today's throttle valves are all wax code using electronic throttle valves, and it is naturally the motor that controls the opening and closing of the valves. When the motor gear is worn, the occlusion is not sufficient, resulting in abnormal noise.

When too much carbon sludge is deposited on the throttle, it will also cause abnormal noise in the wheel plexus. The throttle can be cleaned, and the throttle needs to be disassembled and replaced with the servo motor if the motor is damaged.

3. Poor lubrication of the accelerator pedal bearing produces abnormal noise. You can lubricate the bearing by applying butter to it.

4. The clutch release bearing is damaged, resulting in incomplete clutch plate separation and abnormal noise. Remove the clutch and replace the release bearing.

The possible reasons for the abnormal sound when stepping on the accelerator are:

1. There is an abnormal sound on the accelerator, which is generally the sound of the valve or the fuel injector. The canister solenoid valve also has a sound when it works, but the sound is brittle. The owner can give a little oil at idle to see if there is a change in frequency.

If the frequency does not change, it is the sound of the solenoid valve, and if the frequency changes, it should be abnormal sound at the valve;

2. If the car clicks as soon as the gas pedal is added, it can be judged as a car half-shaft problem. Because the half shaft of the car is prone to bending, twisting and breaking, as well as spline tooth wear or twisting and other faults under the action of long-term torsional fatigue and impact force, resulting in regular shaking of the front of the car when it accelerates to a certain speed range, accompanied by a clicking sound, and the shaking disappears or decreases after releasing the accelerator;

3. If there is a sound when the car is refueled, there are several possibilities: 1. The sound caused by the exhaust part, the exhaust interface pad leakage or the exhaust pipe perforation and leakage; 2. The air intake part, the intake manifold or the throttle body part is leaking or the sealing is not tight; 3. The abnormal noise caused by the engine chassis part, the internal noise of the engine or the accessories around the fuselage, or the chassis parts due to the loosening of the accessories, the abnormal sound of the first letter or the interference resonance, etc.; 4. Internal reasons of the transmission, such as abnormal noise caused by lack of oil or abnormal wear during driving.

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First, check first:

1. Check the clutch, it may be that the clutch bearing is damaged.

2. Lift the car with the hoist, hit the car, hang up the 5th gear, and listen to the connection between the transmission and the engine below, you can judge whether the clutch is damaged.

Second, it is generally the problem of bearing wear and tear of the starting motor for a long time, open the cover to see if there is a foreign object stuck in the **, if you do not remove the starting motor belt, there is no abnormal sound in the start, if there is a problem with the motor, the treatment method is to add wheel grease, or replace, if there is no internal bearing problem in the engine with a long time of wear, the low-speed start grinding force is loud, and the throttle speed is high, the grinding force is small, and the natural sound is gone.

1. If there is an abnormal sound on the gas pedal, the disadvantage is generally the sound of the valve or the fuel injector. The canister solenoid valve also has a sound when it works, but the sound is brittle. The owner can give a little oil at idle to see if there is a change in frequency.

If the frequency is unchanged, it is the sound of the solenoid valve, and if the frequency bends and teases to change, it should be an abnormal sound at the valve;

2. If the car clicks as soon as the gas pedal is added, it can be judged as a car half-shaft problem. Because the half shaft of the car is prone to bending, twisting and breaking, as well as spline tooth wear or twisting and other faults under the action of long-term torsional fatigue and impact force, resulting in regular shaking of the front of the car when it accelerates to a certain speed range, accompanied by a clicking sound, and the shaking disappears or is reduced after releasing the accelerator;

3. If there is a sound when the car is refueled, there are the following possibilities: 1. The sound caused by the exhaust part, the exhaust interface pad leakage or the exhaust pipe perforation and leakage; 2. The air intake part, the intake manifold or the throttle body part is leaking or the sealing is not tight; 3. In the chassis part of the engine, the engine is buried with abnormal internal noise or accessories around the body, or the chassis parts are caused by loose abnormal noise or interference resonance of accessories; 4. Internal reasons of the transmission, such as abnormal noise caused by lack of oil or abnormal wear during driving.

Millions of car purchase subsidies.

1. The inside of the gasoline pump motor is worn or caused by impurities; 2. Caused by throttle damage or excessive carbon sludge; 3. Caused by poor lubrication of the accelerator pedal bearing.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are reasonable abnormal noises. When I went to the repair shop to detect abnormal noises, only nearly 20% of the cars really had problems. Equipped with a turbocharged hairstyle, there is bound to be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that due to their lack of understanding of mechanical knowledge, they mistake reasonable abnormal noise as a vehicle failure.

Therefore, learn to distinguish the abnormal noise of the car and avoid wasting time and energy.

How to identify the sound of a car:

In practice, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the dry friction of the bearing makes a "whooshing" sound, and the "clicking" sound of a small hammer hitting the cement floor is made by excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight sounds, such as the sound of high-voltage electric leakage, the slight loose sound of rolling and teasing bearings, etc., are generally small, the degree of wear and tear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal driving of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

1.This situation may be caused by engine knocking, decay, or lack of oil, or the oil pressure is relatively low, and the friction between the valve and the guide pipe and the hydraulic tappet of the coaxle roll;

2.For this sound, the professional name is called "detonation". The main reason for the formation is that there is carbon deposit on the top of the piston, because the carbon deposit forms a hot surface with high strength, at this time, the fuel mixture entering the combustion chamber begins to spontaneously ignite because of carbon deposit before the ignition stroke;

3.Although this combustion phenomenon seems to be sufficient, this combustion is spontaneous combustion and premature combustion, and there is no safety regulation to burn in the stroke, and there will be a metal sound of the piston hitting the cylinder wall, which is what we often call the rod.

Read more. Factors that trigger detonation.

excessive carbon deposits; Ignition is too early;

Low rpm high grade;

or the addition of low-grade gasoline can cause such failures;

Knocking should be repaired in time, as a long-term and severe knock will lead to early wear of the cylinder components, which will greatly shorten the service life of the vehicle.