HS code mapping for re-importation

List of the table of contents of this article:

• 1,< A href='# What causes the occasional shaking of the engine?' title='What causes the occasional jitter of the engine?' > What is the reason for the occasional shaking of the engine?
• 2, Old Maiteng idling engine intermittent shaking the motive oil smells like gasoline
• 3、engine intermittent jitter
• 4,HS code mapping for re-importation Intermittent shaking in the middle of the car

What is the reason for the occasional shaking of the engine?

1. Serious engine carbon accumulation: Cars always have the problem of carbon accumulation, including cylinder carbonization, throttle carbonisation, spark plug carbonization, intake carbonization, etc. When the engine accumulates too much carbon, it will affect the ignition energy, intake efficiency and air-fuel ratio of the car, resulting in unstable power output of the car, idling and acceleration jitter.

2. Too much carbon accumulation in the engine will cause the throttle valve to be too dirty or too much carbon accumulation in the nozzle, making it very difficult to start the engine, resulting in idling shaking after cold start. It may also be a problem with the ignition system. Car owners can check spark plugs, high-voltage wires and ignition coils.

3. Consider the dynamic balance of tires. 2. Consider the failure of fire when the spark plug is ignited. 3. Consider whether the air intake is smooth, for example, the air filter is blocked by willow lint, etc., resulting in the air intake is not smooth. 4. Consider whether the fuel supply is smooth, such as the fuel filter is blocked.

4. The reasons for engine shaking are as follows: engine cylinder deficiency: engine cylinder deficiency mainly refers to the abnormal operation of one or more cylinders of the engine, which is usually manifested as obvious intermittent exhaust gas flow in the car and violent shaking of the exhaust pipe, so the engine shaking can be clearly felt, sometimes accompanied by sudden The sound of.

5. The main reason for idling jitter: serious engine carbonization: cars always have the problem of carbon accumulation, including cylinder carbonization, throttle valve carbonisation, spark plug carbonization, intake carbonisation, etc.

The intermittent shaking of the old Maiteng idling engine has the smell of gasoline

The engine has serious carbonization. The most common cause of idling jitter is excessive carbonisation of the throttle valve or fuel nozzle.

Idling shaking, the smell of exhaust gas may be caused by insufficient combustion of fuel or burning of oil. The participation of oil in combustion will change the mixture, thus affecting the exhaust gas emission, resulting in failure of the annual inspection. Prevention method I: Use fuel and genuine engine oil from regular gas stations.

The oil pressure is unstable. If you have cleaned up the engine carbon, washed the throttle valve, changed the oil pad and spark plug, etc., you still find that the body shakes when idling, go to the 4S store to check the fuel supply pressure and intake pressure.Force sensor, if the oil supply pressure of the oil pump is abnormal or the numerical error and poor operation of the intake pressure sensor will cause the body to shake.

Engine intermittent jitter

The causes and solutions of engine intermittent jitter are as follows: engine carbon accumulation; 90% of engine jitter is caused by carbon accumulation. Just go to the 4S store or the repair shop outside to clean up the accumulated carbon. Spark plug problem; long-term use of spark plugs will increase the gap between the electrodes, resulting in weak ignition energy.

Engine intake pipe leakage: There are many intake manifolds or various valves in the intake system. Leakage will allow the gas that should not be entered to enter, resulting in excessive or too low concentration of mixed gas in the intake manifold, which eventually leads to intermittent shaking or weak symptoms when the engine idles. The leakage point needs to be repaired.

The ignition system does not work well, and the spark plug jumps poorly, which will also lead to such failures. It is recommended that you go to 4S to check whether the fuel supply pressure and intake pressure sensor are normal. If the oil supply pressure of the oil pump is abnormal or the intake pressure sensor value is wrong, poor operation will cause the body to shake.

Intermittent shaking in the middle of the car's driving

Engine cylinder deficiency: Engine cylinder deficiency mainly refers to the abnormal operation of one or more cylinders of the engine. Generally, it is manifested as: the exhaust gas flowing out of the car has obvious intermittentity, the exhaust pipe shakes violently, and the engine shaking can be clearly felt, sometimes accompanied by Strange sound. This is mostly related to the failure of the ignition coil.

The most common reason for car shaking is that the throttle valve is too dirty or the fuel injector has too much carbon.

There is a high possibility of intermittent shaking in the middle of the car driving. Air intake system, fuel system, ignition system, any part of these three systems will cause intermittent shaking when the car is running. The reason for the intake system may be that there are too many impurities in the throttle valve and intake duch, resulting in the inability of the driving computer to accurately control the idle intake.

Most of the jitter of the vehicle when driving is related to the transmission system, the most basic of which is the problem with the tire. If the owner suspects that the vehicle shakes while driving because of the tire, the easiest way is to touch the tire tread with your hand. If the tread is jagged, it means that the tire has aged and deformed.

Check whether the ignition system is faulty. Generally, it is caused by the ignition coil or the aging of the spark plug. It is enough to replace the damaged ignition coil or spark plug. The inspection of the ignition coil needs to read the specific fault code with the computer. If the corresponding cylinder has a misfire, it is generally a problem with the ignition coil.

Slight shaking is normal. If the shaking is serious, it needs to be checked. The most common cause of car shaking is that the throttle valve is too dirty or the fuel injector has too much carbon.