After the cold start, there will be engine shake, idle unstable stalling, or gear stalling phenomeno

Main causes of idle jitter:

1.Serious engine carbon deposits: Cars always have the problem of carbon deposits, including cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, intake carbon deposits, etc.

When the engine has too much carbon deposit, it will affect the ignition energy, air intake efficiency and air-fuel ratio of the car, resulting in the unstable power output of the car, and the phenomenon of idle speed and acceleration jitter appears.

2.Unstable oil pressure: If you have cleaned the engine carbon deposits, cleaned the throttle, replaced the oil gasket and spark plug, etc.

And when idling, you still find that the body shakes, it is recommended that you go to the 4S shop to check whether the oil supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is abnormal, or the intake pressure sensor value is wrong, and the work is not good, it will cause the body to shake.

3.Engine cylinder shortage: Engine cylinder deficiency mainly refers to the engine one or more cylinders are not working properly, which is generally manifested as:

The exhaust fumes coming out of the car are obviously intermittent, and the exhaust pipe shakes violently, and the engine shake can be clearly felt, sometimes accompanied by abnormal noises. This is mostly related to ignition coil failure.

4.Aging of engine parts: Shake in the car is also associated with the aging of the engine feet (also known as claw pads).

The engine foot is actually the shock absorber system of the engine. The engine feet are responsible for absorbing slight vibrations when the engine is running. If there is a problem with the engine base, these vibrations can be transmitted to the steering wheel and cab, causing vibrations at idle.

Solution; The best way is to clean the oil circuit, clean it regularly, and use PNF fuel additives to solve the above problems caused by carbon deposits. The fuel quality is not very good or the initial fuel of the new car is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel and cause no good fuel to participate in combustion in the later stage, and the carbon deposition exceeds the standard, which is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits.

First, it may be caused by the low pressure of the gasoline pump.

Second: the viscosity of the engine oil is too high, it is recommended to use 0w or 5w oil to try.

Third: If the car is older, you can check the engine condition.

Fourth: Check the tailpipe.

The car starts cold, the engine shakes a lot, and sometimes it stalls.

Due to long-term low-speed exercise, resulting in carbon deposits, and then unstable idling, causing damage to the engine, solution, 1 cleaning, 2 running at high speed and high speed for a period of time.

A large reason is that there is too much carbon deposit, especially at the intake valve, which is easy to absorb the mixed oil and gas, especially the low starting speed, resulting in an imbalance in the air-fuel ratio, causing the engine to surge and then stall. When starting again, due to the saturation of oil and gas in the carbon deposit, more oil and gas can not be absorbed, and the specified air-fuel ratio is reached, and the short-term concentration of oil and gas becomes larger, which helps the engine to ignite, with the heating of the temperature, the oil and gas in the original carbon deposit evaporates, and returns to normal.

Is it caused by low temperatures? Or is it just like that? Regardless of the idle speed, if the temperature is low, the heat conversion efficiency is low, the combustion heat conversion kinetic energy is low, the power is reduced, and the second is poor lubrication. So when it's cold, try changing the engine oil.

Idle shivering may be caused by carbon deposits, it is recommended to clean the throttle and fuel injector, and replace the spark plug.

Hello! Car owners often do maintenance and warm up the engine for a few minutes every time they drive.

It's not that the temperature is low, it's always.

Hello, it is recommended to go to the maintenance station to clean the throttle, restart the matching, see if the idle speed is stable, and check other faults.

If this is the case for you, it is best to treat the throttle valve and check the engagement of the clutch if it is a manual transmission model.

Then your situation may be caused by excessive carbon accumulation on the throttle, and it is recommended to disperse and clean the throttle.

In this case, it is generally possible that it is caused by excessive carbon deposits in the engine, and it is recommended to check and clean up the carbon deposits in the engine.

Hello, this situation is because the internal fluidity and lubrication of the engine in the cold car state are relatively poor, resulting in insufficient combustion inside the engine, this situation is a normal phenomenon, you can drive with confidence.

Hello, this problem is also caused by more carbon deposits in the engine, you clean the throttle, fuel injector and trachea carbon deposit.

Hello, the water temperature of this cold car has not returned to normal, and it will definitely be a little shaky when it starts

This may be caused by too large spark plug clearance, and check the carbon deposit of the engine, and do regular inspection and maintenance.

In this case, it is considered that it is caused by carbon deposits in the engine, and it is recommended to clean the throttle and fuel injector.

Hello, if the idle speed does not shake, it should be caused by carbon deposits, and the starting jitter should be the operation and sake,

The point is to check, is it due to the quality of the gasoline? Also, check if there is a lot of carbon deposits in the throttle and air intake? It is also possible that the fuel pressure is not maintained. Then you also need to check if there is a problem with the fuel injector?

Hello, if the vehicle does not shake when it is cold, the starting shake should be caused by poor oil separation, and there is carbon deposition on the throttle.

Hello, it may be caused by too much carbon deposition in the engine, clean the throttle and replace the spark plug.

There is a lot of carbon in the combustion chamber, so it is good to clean it.

This situation may be that the gasoline pump is blocked, or it may be that the oil pump is old, I have encountered this situation, the idle speed will not shake if the amount of oil is small, and the oil demand will not be able to supply it when it starts, and it will be normal when the car is hot.

Based on what you said, Avanti's preliminary judgment is that it is a phenomenon caused by excessive carbon deposit. A slight jittery in the morning idling is.

No problem