What causes the car to be particularly loud when it is lighted?

The reason why the car is so loud when it is lighted:

1. The relative sound of the cold car and high idle speed is louder, and then there is the compressed sound of the secondary air pump. All in all, it feels like it's louder.

2. If the ignition sound is the most sexual, or the ignition is turned off after the ignition, it is recommended to go to the maintenance shop to check the spark plug, and at the same time, dredge the automobile oil pipeline.

Extended Information:Routine maintenance of your car:

1. Cleaning: The air contains a lot of dust, sediment and acidic substances, which are not only easy to be adhered to by leaking fuel, but also easy to form a hard insulation layer under high temperature baking, which makes the heat dissipation performance of the parts worse, and is easy to be eroded by the static electricity of the body and erode the paint surface, making it fade prematurely.

2. Fastening: After the vehicle is cleaned, it is necessary to tighten the connections. Due to the vibration, bump, swing and other reasons during the driving of the vehicle, the connection will inevitably be loose and worn.

Therefore, it should be tightened in time during daily maintenance. The daily fastening work of the connector is directly related to driving safety, especially the steering, braking, transmission, etc. of important components, which must not be taken lightly.

3. After the connector is tightened, Bel should check the height and quality of the oil, because the liquid will gradually lose and oxidize at high temperature, resulting in the reduction of the liquid level and the deterioration of performance.

The high idle speed of the cold car is relatively louder, and then there is the compressed sound of the secondary air pump, so it feels louder.

Dear Kiss Glad to serve you The reason why the engine sound of the car ignition in the morning is particularly loud: 1. The sound of the car is particularly loud, it may be that there is a problem with the rubber gasket between the engine and the frame, if it is aging or loose, it will make abnormal noise. The gasket is mainly to allow the engine to have a buffer time in the process of vibration, but if the foot glue is aged, it will make the motor engine shake when working on the bridge.

2. If the engine cylinder is damaged, the exhaust gas discharged from the cylinder during normal operation is uneven, which will also make the exhaust pipe shake, and there will often be a sudden sound. 3. If the gears on the vehicle parts are hardened or the gap between them is not properly adjusted after long-term use, it will also cause the engine to be loud when ignition. In this case, it should be replaced in time, and some lubricating oil should be added.

4. When there is carbon deposition in various departments of the car, there will also be sound, this is because in the process of volatilization of gasoline, some of them will not volatilize in time and will coagulation, and the coagulation will cause some parts to be affected by carbon deposition.

The best working temperature of the engine is about 90 degrees, and the cold car just starts because the engine working temperature is not enough, so the idle speed is higher, the engine speed is high, and the sound is loud. Another reason is that the oil is deposited in the oil pan in the cold driving state, so insufficient engine lubrication is also one of the reasons for the loud noise.

The rattle of the valve. Generally, due to the vehicle being parked for a long time, the engine lubricating oil returns to the oil pan. When the engine is first started, the oil pump does not provide immediate oil pressure, so that the internal valves of the cylinder head are not lubricated.

When the lubricating oil flows out through the arm, the sound will decrease, or even disappear. This is very normal. Even the best vehicles have this sound, but the noise is different.

There is an old saying in the car repair industry, which is called the pin of a cold car and the tile of a hot car. There is also the solenoid valve, if it is the last one, then you have to say that you are a little too sensitive! The judgment method is also very simple, when the sound is slightly blocked, add a little oil in the oil injection mouth If it doesn't sound to say, if your voice walks in front of me, as long as you hear it, you basically know the reason, so many repairs say start the car and let me listen to the judgment again, I basically don't have to, if the judgment is not accurate, the general climb up to listen to the inaccurate, is in the blind guess.

It is estimated that the valve rings for the cool car, the solenoid valve for the carbon canister may sound for the hot car, and the high-pressure oil pump may sound if it is a TSI engine. The latter two are normal. In general, when the car starts cold, the engine sound will be slightly louder than when the car is hot, as long as the sound sounds uniform and soft, not harsh, there is generally no problem.

Most of them are valve sounds, which are related to oil pressure, hydraulic tappets, and engine oil. Don't worry too much about it. Cars are consumables.

The oil is not enough, mine is that the oil level is not on the scale line, resulting in sound seepage, add oil to the upper limit will not sound, maintenance must pay attention to look at the oil dipstick, the engine just started when the oil pump can not immediately provide oil pressure, so that the internal valve of the cylinder head can not be lubricated. The resulting click-and-click sound. When the engine has been running for a period of time, the oil temperature rises and the engine starts to work normally, and the sound will automatically disappear.

The oil in the oil tank is pumped back into the engine for lubrication, so the sound is quiet for a minute or so. It is recommended to start the machine after the sound has become quieter and allow the machine to be fully lubricated.