The car has an abnormal sound when you step on the accelerator, and what happens when you step on th

If there is an abnormal sound when you step on the accelerator, it may be that the gap between the drive shaft is too large, or the lubrication is not good, and the assembly is not in place during maintenance, resulting in a sound due to friction when the torque output is large.

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 engine surface), the impact sound of the gear when shifting, the air intake sound, the exhaust sound, 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 noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc. Generally, the volume is small, the wear 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.

General sounds, such as the sound of flywheel bearings, clutch release bearings, etc., have a significant impact on the performance of the car, but in the short term can still maintain its main technical performance, such sounds are generally louder, and the wear of parts is relatively large.

This kind of noise is very troublesome, there are too many systems involved, it is difficult to eliminate, you must be mentally prepared, and some cars will make intermittent noises, and they will not ring for a few days, so you still have to run for a while to find the problem.

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.

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.

Millions of car purchase subsidies.

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.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.

1.This situation may be engine knocking, or it may be a lack of oil, or the oil pressure is relatively low, between the valve and the duct and the hydraulic tappet Mobishan friction;

2.For this kind of sound, the professional name is "Burst Bridge Hui Xiangzhen". 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;

Prolonged and severe knocking will lead to early wear of cylinder parts, which will greatly shorten the service life of the vehicle.

1. Gasoline pump motor abnormal noise: When the internal rough handle of the gasoline pump motor is worn or there are impurities, it will make abnormal noise as we step on the accelerator. This kind of problem needs to be replaced.

2. Throttle abnormal sound: Today's throttle valves are all electronic throttle valves, and the motor is naturally the one that controls the opening and closing of the valve. 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 the throttle to produce abnormal noise. The throttle can be cleaned, and the throttle needs to be disassembled and replaced with the servo motor if the motor is damaged.

3. Abnormal noise caused by poor lubrication of the accelerator pedal bearing: it can be cracked to apply butter to the bearing for lubrication.

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