What happens when the cold car shakes badly after starting

In this case, the first is low temperature, the temperature in the engine is not enough, so more fuel should be injected during cold start to meet the requirements of power. The greater the gap between the spark plugs, the smaller the ignition energy. When the fuel atomization is not good at low temperature, the fuel needs higher ignition energy, and the ignition gap of the spark plug is easy to become larger when the car is used for a long time, resulting in a decrease in ignition energy, which affects the dynamics and makes the car shake.

The seasonal maintenance of the cooling system should first check whether there are traces of leakage in the drain holes, thermostat joints, upper and lower water pipe joints, water outlets, water tank covers and water storage tanks of the water pump from the appearance.

If a leak is found, the cause should be eliminated immediately, and it must not be improvised. To check the freezing point of the antifreeze. In general, the freezing point of the liquid antifreeze is 5 to 10 times lower than the minimum temperature in the area where the vehicle is traveling.

For example, for vehicles in the Beijing area, the freezing point of antifreeze is between minus 25 and minus 30 to ensure a safe winter.

Note that the liquid level height of the antifreeze is generally about 10 mm away from the water tank filling port, or according to the standard scale on the water tank, add the same kind of antifreeze, do not add too much antifreeze or water, and leave sufficient thermal expansion space for the water tank.

Mine will also, but also more than 40,000 kilometers, cold car start immediately hang D gear, a release of the brake car will go forward, step on the brake will shake very much, and so the speed down, the water temperature will be normal, and now the air-conditioned car is also shaking, the engine sound will also become louder, 4S said that the load of the air-conditioned car is hit, shaking normal, it is really not good to clean the oil road.

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

1. There are several main reasons for cold car start-up jitter: carbon deposition, weak ignition, low cylinder pressure, unqualified fuel, etc.

The reasons for this are described in more detail:

Too much carbon deposits in the throttle, fuel injector, and intake tract may be one or all of them.

When there is too much carbon deposition inside the engine, the gasoline emitted from the cold start injector will be absorbed by the carbon deposit, resulting in the cold start mixture being too thin and causing the start to shake.

Mechanical failures such as ignition coils, spark plugs, and fuel injectors lead to cylinder shortages.

Low oil pressure or cylinder pressure, resulting in insufficient power, etc.

The fuel quality is not up to standard.

The idle control valve is damaged or dirty.

The intake manifold is leaking.

Damage to the engine arm or claw pads, etc.

The oxidation or grade of the oil is low, mainly due to poor fluidity at low temperatures, and the cold start protection of the engine is not in place.

2: It is recommended to go to a 4S shop or repair shop to check and repair to improve the safety performance of the car.

Hello, check the spark plug gap and take a look at the throttle.

What is the cause of the "shaking" engine start-up of a cold car?

How many kilometers have passed, and the throttle injector has not been cleaned?

Hello According to your description, there are many reasons for the shaking when the cold car starts, one, the engine has low ignition energy at low temperature. Second, the engine mixing ratio is not suitable, and third, the engine valve and intake tract carbon deposit. Fourth, the working conditions of each cylinder of the engine are different.

The viscosity of the cool car oil is relatively large, and the oil can't go up just now, resulting in shaking.

What is the cause of the "shaking" engine start-up of a cold car?

The problem you said is not directly related to maintenance and hot car, under normal circumstances, one minute is enough to warm up, the purpose of hot car is only because the temperature is low in winter, the viscosity of the lubricating oil is too high, and the lubricating oil can achieve a better lubrication effect through the hot car! If the vehicle is shaking at 60 yards and above 80 it is not, it is certain that there is a problem with the transmission!

Because the cold car starting oil is relatively viscous, the belt speed is unstable, sometimes fast and sometimes slow, so the car will shake.

First, check the air intake system for carbon deposits, and then check the ignition system, clean the former and replace the latter.

It is normal for a slight shake to occur when the idle speed is high when the cold car starts, and it will not shake after about 20 seconds after the idle speed drops and stabilizes.

This needs to clean up the carbon deposits in the engine, and it needs to be cleaned up.

As soon as the vehicle is started, it is stable as soon as it is operated!

Shake it when it starts cold, it is normal, because the engine oil is on it, the speed is high, it is allowed to be protected, the hot car shakes, carbon deposits or the water temperature is too high, and the ignition time is not right, so adjust it to 4s.

Bad ignition or bad oil tapping.

Pull down the high speed and try again, but don't wash the charcoal.

Carbon build-up on the valves, leaking injectors, etc.

The car was left overnight, and the engine's lubricating oil flowed back into the oil pan. When the engine starts cold, the oil pump can not establish the oil pressure at the first time, and the oil film is formed between the components, especially the valve inside the cylinder head (upper part), which is not lubricated during the cold start, whether it is a hydraulic tappet or a mechanical rocker arm, there will be a certain valve clearance, resulting in a clicking sound. When the engine runs for a period of time, the oil pressure builds up the oil film, the oil temperature rises, the fluidity of the oil is better, and the engine shake will be smaller.

This is normal, don't worry. The oil pressure does not come up when the car is cold, so the operation of the mechanical parts will cause a little unstable idling, as long as the engine condition tends to be stable after the car is warmed up, it is fine.

If the start-up jitter is severe, it is recommended to check whether there is carbon build-up in the engine, and check the throttle injector and spark plug.

Hello, this situation is generally caused by serious carbon deposits in the engine, and it is recommended to clean the throttle valve under the carbon deposits.

Hello, this comes from the fact that when he first started, the car was not fully lubricated, so this shaking and noise were more serious.

Hello car owner, cold car start-up idle shake need to check whether the engine carbon deposit is more, more carbon deposit will lead to cold car shaking, idle unstable, fuel consumption increases, serious will also lead to starting difficulties, you can first check the position of the throttle position carbon deposition clean the oil circuit throttle.

Hello, the lubrication effect can not be achieved when the car is cool. It's easy to shake, so if it's particularly severe, go to the store and check it out.

It is normal for the car to shake slightly from a cold start, and it is recommended to clean up the engine carbon deposit if the shaking is serious, which should be better.

Hello, if the weather is cold, the moment this cold car starts is indeed shaking, and it will be fine in a while.

Because after a long period of precipitation, the lubricating oil of the engine has been precipitated to the bottom, and the vibration will be relatively large when the vehicle starts at this time.

Hello, this cool car starts with a slight shaking, if it is serious, it is caused by too much carbon deposition on the throttle.

Hello, the main thing is that your engine spark plug ignition coil, and then the throttle body is dirty and will cause shaking.

In this case, there must be some carbon deposit, it is better to go to the repair shop to test it and then clean it up.

Hello, if the idle shake of the cold car start is bad, it should be caused by carbon deposits in the engine, clean the throttle and try it

Hello, your situation is generally caused by excessive carbon deposits in the engine, and it is recommended that you go to your local 4S shop to check it.

Since it should be replaced by the old one, I feel that I should use a decoder to drop the code, sometimes the intake air temperature, water temperature sensor signal is not accurate, so as to give the computer the wrong signal, the wrong correction of the amount of fuel injection will also cause the above situation.

It may be caused by carbon deposits in the combustion chamber, or the fuel injector of the throttle is too dirty, and the surface with carbon deposits is larger.

Most of the cold start jitter is caused by poor fuel combustion, the fuel tank has more gum moisture, and the cold start is not brought to the combustion chamber and then mixed in the fuel tank is driven into the combustion chamber, and the jitter caused by poor combustion.

There are several causes of engine shake;

1. The engine has serious carbon deposits, and the most common car with serious shake is that the fuel injector throttle valve is too dirty or too much carbon;

2. Ignition system problems, check the working conditions of spark plugs, high-voltage wires and ignition coils;

3. If the oil pressure is unstable, if the pressure of the pump is abnormal or the error and poor work of the inlet pressure sensor will cause the body to shake;

4. Aging of engine parts; Excessive carbon deposits in engine emissions absorb carbon from the gasoline of the cold-start injector, which leads to a dilute cold-start mixture and difficulty starting.

Specific solutions to idle jitter:

1. The engine has serious carbon deposits. The most common cause of idle judder is excessive carbon build-up on the throttle or injector. When there is too much carbon deposit inside the engine, the gasoline sprayed by the fuel injector during cold start will be absorbed by the carbon deposit, resulting in a mixture that is too thin and making it difficult to start.

After landing, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the engine and burned, which will thicken the mixture. The mixture is sometimes dilute and sometimes thick, which will cause idle jitter after cold start. The lower the temperature, the greater the amount of oil required for cold starts, and the more the presence of carbon deposits affects cold starts.

The solution is to clean the carbon deposits at the throttle and injector.

2. Poor ignition system and poor ignition of spark plugs will also lead to engine idling and shaking. If there is a problem, check if the ignition system is faulty and if there is too much carbon deposited in the spark plug.

3. The oil pressure is unstable. If you have cleaned the engine carbon deposits, cleaned the throttle valve or replaced the spark plug, and there is still the problem of body shaking when idling, it is recommended to go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. If the oil pump is not properly supplied or the intake pressure sensor is incorrect, it will also cause the body to shake at idle.

Solution; The best way is to clean the oil circuit, clean it regularly, there is no specific experience in the research and development parameters of the clean engine from the new car, coupled with the continuous improvement of emission standards, can not adapt to the change of fuel, all manufacturers of the engine are unable to solve this jitter problem in the short term, plus the fuel quality is not very good or the initial fuel of the new car factory 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. The occurrence of excessive carbon deposits is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits. The use of PNF dope fuel additives can solve the problems caused by carbon deposition.

Severe cold-start jitter is caused by insufficient engine temperature. When there is too much carbon deposition in the hairstyle collision engine, the gasoline from the cold start fuel injector spray beam will be absorbed by a large amount of carbon deposit, resulting in thin mixture, weak ignition, spark plugs, fuel injectors and other mechanical failures during cold start.

Carbon deposition is a perennial problem for engines. Too much carbon deposits in the valves and intake tubes, making it difficult to start a cold car. Because carbon deposits can absorb the right amount of fuel, the ECU is misjudged.

In fact, the computer controls the hypothetical 100 parts of oil and gas ejection, but only 90 of them actually go into the cylinder (10 parts are absorbed by carbon deposits), so even if the remaining 90 parts of the mixed oil and gas are fully burned, the required power cannot be achieved, and the phenomenon of jitter is inevitable.

In addition, ignition coil failures are also common. The ignition coil is a transformer that is responsible for converting the vehicle's low-voltage current into high-voltage electricity, so that the spark plug has enough voltage to "produce a spark". Once the ignition coil fails, such as its own rupture, leakage, etc., it will cause insufficient or lack of ignition ability of the spark plug, and then make the cylinder mixture not deflagrate, resulting in the lack of cylinder, difficulty in starting, acceleration shake and stool movement.

Millions of car purchase subsidies.

Mine will also, is also more than 40,000 kilometers, cold car start immediately hang D gear, a release of the brake ruler Lu car will go forward, step on the brake will shake very much, and so the speed down, the water temperature up to destroy the sleepy match is normal, and now the air-conditioned car is also shaking, the engine sound will also become louder, 4S said to open the air-conditioned car finger load hit, shaking normal, said that it really can't clean the oil road.