There is a problem with the ignition system or fuel system. After that, it is recommended to check the ignition system and fuel system.
1. Correctly distinguish between normal and abnormal sounds.
When the car is running, the vibrations of various mechanisms will make sounds of different kinds, but the sound does not mean that the car is defective. In order to avoid unnecessary disassembly, you must first distinguish what is normal. abnormal sounds and sounds. Normal vibrations of various system components (such as noise on the engine surface), gear impact noises when changing gears, intake and exhaust noises using gas as a work source, gear meshing noises, etc. are all normal sounds. Abnormal noises (abnormal noises) can be divided into light noises, normal noises and malignant noises according totheir impact on the performance of the car. Slight noises, such as the flashing sound of high voltage electrical leakage, the slight rolling noise of bearings, etc., generally have a small volume, the wear degree of the parts is not large, and it does not There is no significant change for a long time. Such defects can still keep the car without repair normal driving.
3. When diagnosing abnormal car noises, attention should be paid to creating good auscultation conditions and trying to eliminate interference from 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 screwdriver or other metal rod as a stethoscope to contact the sound part to amplify the sound , or use a single cylinder to cut off the fire to reduce the sound, to meet the diagnostic needs. The ausc websiteultation should remain calm to minimize human interference.
3. Below we list some common abnormal car noises that are easy to eliminate along with simple methods of identification and elimination.
1. There are abnormal noises in the body
Explanation of symptoms: When you drive and press the accelerator or brake, there are always abnormal noises from some parts of the body. .The sound is not loud and does not affect normal operation, but there is always a little worry that something is wrong.
Problem analysis: This problem usually occurs because the rigidity of the body is insufficient, causing the vehicle to deform while driving, the door and frame to rub or shake, or desoldering to certain places causes friction between the steel plates. , etc. .
Some cars also have a loud noise.Stronger wind. To some extent this has to do with the shape of the car. In some cars, body parts are not properly secured and may be the cause. abnormal noise. Generally, tighten the screws. This can be resolved.
Solution:
First check whether there are any loose objects in the trunk or on the rear seats that are easy to roll and make sounds, and exclude some items that are not securely attached and emit sounds. . noise.
If you find that the friction between doors and windows causes abnormal noises, you can stick tape on the doors and windows or put rubber on the friction parts. You may be able to reduce or eliminate abnormal noises. , but the result is only a temporary solution and not the root cause of the problem. If none of the above problems are found, you should go to a regular repair shop for udo inspection and troubleshooting.
2. There are abnormal noises in the engine
Explanation of the symptom: There is a greater possibility of abnormal noises in the engine compartment. Most people also judge that abnormal noises come from the engine. engine compartment depending on the source of the sound, usually a metallic screech or.A hissing noise.
Problem Analysis: Abnormal noise coming from the engine compartment will include a loud whistling sound from the belt, which is usually caused by belt slippage. There will also be a sharp sound of dry rubbing of metal parts when the engine is running, which is usually due to damage to the bearings of the generator, water pump, and power steering pump. If the sound of air leaking is caused by the engine running, it may be the result of a blocked engine; exhaust system, vacuum tube leak or rupture.
Solution: Abnormal engine noise indicates that the technical condition of a certain engine mechanism has changed. This is mainly due to excessive wear of certain parts or poor assembly and adjustment. Certain abnormal noises can predict the possibility of accidental engine damage. Therefore, when abnormal noises occur in the engine, they should be repaired in time to prevent the fault from extending.
It is worth remembering that if there is an abnormal noise in the engine, the car owner is unlikely to be able to solve it himself and it is better to send it to the factory for maintenance.
3. There is an abnormal noise in the gearbox
Explanation of symptoms: If there is a “rusting” sound inside the gearbox while the car is driving, but it disappears after the clutch or accelerator is pressed, replace it. A hissing sound will be heard when chspeed change.
Problem analysis: If the source of the noise encountered while driving is the gearbox, it may be due to wear of the gearbox bearings or gears, or to points rolling. If the transmission makes abnormal noises when shifting at high speeds, the transmission oil may contain metallic powder, indicating excessive wear of components such as the gear belt clutch. brake of the gearbox.
4. There are abnormal noises in the tires
Symptom description: The tires emit rhythmic noises, and the faster the vehicle speed, the higher the frequency.
Analysis problem: When a car tire contacts the ground, it will produce various noises of different strengths and weaknesses depending on the type or irregularities of the road, the speed of the car, tire type and air pressure of the pneu himself. Therefore, no matter how perfect a car is, it cannot completely eliminate the noise generated by tires and ground while driving.
5. The engine guard makes an abnormal noise.
Explanation of symptoms: The engine guard has been installed for some time, but after a ride in the suburbs, there was a noise at the skid plate at my return. Strange noise.
Solution: Screws tend to move around in cars that move frequently. If you often hear "pop, pop, pop" noises coming from the air intake grille, in addition to the grille, in addition to the clearance, the car owner should always check whether the skid plate screws of the motor are loose or if the motor guard plate and the bottom plate are loose. If the abnormal noise is caused by loosening, in addition to tightening the screws, some cardboard objects also need to be placed. the area of abnormal noise. THEAbnormal noise can be easily eliminated.
6. Brakes make abnormal noises
Symptom description: The vehicle makes relatively loud noises and abnormal noises when the brakes are applied.
Problem Analysis: Of course, abnormal noise when braking may also be caused by other reasons, such as improper use or deformation of the brake disc material, hardness, porosity, friction characteristics and unsatisfactory compression characteristics, brake pads and brake discs become wet and rust, the thread in the brake pad formula is too hard, and mechanical brake padsScratches and other reasons. To resolve this problem, simply brake vigorously several times in succession to eliminate the abnormal noise.
6. The brakes make abnormal noises
Symptom description: The vehicle makes relatively loud noises andabnormal noises when the brakes are applied.
Problem Analysis: Of course, abnormal noise when braking may also be caused by other reasons, such as improper use or deformation of the brake disc material, hardness, porosity, friction characteristics and compression characteristics are not qualified, the brake pads and brake discs are wet and rusty, the metal wire in the brake pad formula is too hard, and the mechanical scrapers of the pads brakes are among the reasons. To resolve this problem, simply brake vigorously several times in succession to eliminate the abnormal noise.
Solution:
The brake pad is one of the most important parts of the brake system. Generally, the lifespan of the front brake pad is 30,000km and the lifespan of the rear brake pad is 30,000km. the brake pad is 30,000km. The lifespan of dynamic friction plates is 120,000 km. If there is a "squealing" sound when applying the brakes, it is most likely a warning sound coming from the brake pad wear indicator, which indicates that the brake pad brake has exceeded its usage limit. When this happens, car owners should go to the car dealership for maintenance as soon as possible, otherwise the brake pads will be exhausted, causing damage to brake components, abnormal braking effect and accidents.