Analysis of the specific reasons for loud engine noise:
1. When I stepped on the accelerator, I found that the acceleration was not obvious, there was a lack of power, and the engine made a hysterical sound. The times most likely to occur are when the engine is hot or cold, or when it is low on oil. The causes of these problems can be divided into air filter, spark plug, ignition wire, gasoline, fuel filter, carburetor, oil pump and other problems. Check if the air filter is dirty, if the spark plug is old and needs to be replaced, if the ignition coil is broken, and if the gasoline is not clean, such as water in the fuel line. 'oil. Also check the oil pump.
2. When driving, acceleration is normal and ignition may be normal. However, if you drive at a constant speed, you notice that the engine speed is too high but the speed seemsalways be. unable to increase. Try checking the coolant. Oil pressure is too high or too low. Check the pressure gauge. There may be a problem with the ignition time setting, which may also cause such symptoms. As with others, it could be a problem internal to the engine, such as a clogged EGR valve.
3. The motor makes a whistling sound, which sounds like steam or air coming out of the motor. Typically, after hearing this sound, the engine will quickly lose power. Possible problem, engine overheats, check cooling system. The exhaust system is clogged, the suction pipe is leaking or broken.
4. When accelerating, the engine will make a whirring sound, or it will also appear when decelerating. In short, the sound will change as the regime changes. The possible reason is lack of power steering oil, fill it up. The bearingss of the generator could be damaged. Problems with the power steering pump and water pump will produce similar noises.
5. A very loud noise comes from the exhaust pipe, which is very annoying. Sometimes a similar noise comes from the front part. The main problem is the exhaust system. Check if the exhaust pipe is broken.
6. When the motor is running, it makes a clicking sound, as if something is hitting metal. When accelerating or driving, you may not hear anything. This may be caused by the cylinder valve, which can be changed by adjusting the valve. Lack of engine oil can also cause similar problems. Additionally, engine oil pressure is relatively low.
7. When you press the gas pedal, you will hear a clicking noise coming from the exhaust pipe. The sound may not be very loud and the car will not drive abnormally.ent, as well as fuel consumption. will increase. It is recommended to check the muffler and exhaust pipe for damage.
8. The motor makes a kicking sound, like the sound of a pencil hitting the table. The sound increases as engine speed increases. The possible cause is that there is dirt inside the engine. It is recommended to change the oil, filter and clean the engine. Others may be a valve problem.
9. There can be no rattling noise while driving. It is recommended to check the ignition time setting. The engine may be overheating, the engine may have carbon deposits, and the oil quality is poor. a higher quality oil may be necessary.
10. High-pitched, squeal-like noises, especially when the air conditioner is on, the weather is cooler, and it's more obvious when you slow down. Possible reasons arethat the drive belt is slipping and the driving direction is too high, reaching the limit. The belt is too loose, tighten the beltCan be solved.
11. When driving at low speeds or when refueling, sounds such as crowning and crowning will be heard, especially when the weather is cooler.