Suteng old 1 8T, what is the reason for the cold start jitter in the morning?

Due to the decision of the control characteristics of the electric injection engine, the cylinder is first injected and then ignited every time it works, and the ignition is cut off immediately when we extinguish the engine, but the gasoline sprayed out by this working cycle can not be burned, and can only be attached to the intake valve and the wall of the combustion chamber, the gasoline is easily volatile, but the wax and gum in the gasoline are left, and the wax and gum in the gasoline accumulate thicker and thicker in the long run, and the carbon deposit is formed after hardening after repeated heating. If the engine burns oil, or if the gasoline is of inferior quality and has more impurities, then the valve carbon deposits are more severe and form faster.

Because the structure of carbon deposition is similar to that of a sponge, when the valve forms carbon deposition, a part of the fuel injected into the cylinder will be adsorbed, which makes the concentration of the mixture that really enters the cylinder thin, resulting in poor engine work, and abnormal phenomena such as difficulty in starting the cool car, unstable idling, poor acceleration, and increased fuel consumption. It is recommended that you check whether the engine has serious carbon deposits. If there is no shortage of oil, measure the oil pressure.

After all are eliminated, due to the engine shaking after the car, the speed cannot reach the specified value, resulting in low pressure, and the oil lamp will also alarm.

Hello, most of them are caused by too much carbon deposit, it is recommended to clean the throttle, fuel injector, intake tract and then pull the high speed to try, I hope it can help you! [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

1. The oil pressure is unstable.

If you have cleaned the engine carbon deposits, washed the throttle, changed the oil pad and spark plug, etc., and still found that the body shakes when idling, it is recommended that you go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. Solution: Check the oil pressure and replace the parts if necessary.

2. Aging of engine parts.

Car jitter is also associated with aging of the engine feet. The engine foot is actually the suspension system of the engine, and the engine foot is responsible for absorbing the subtle shake of the engine when it is running, and if there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing shaking when idling. Workaround:

Replacement parts. 3. The engine has serious carbon deposits.

Carbon deposition is severe. The most common cause of car shaking is that the throttle valve is too dirty or the fuel injector has too much carbon deposit, in this case, only when the gasoline absorbed by the carbon deposit is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine after the car is burned, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start. Solution: Clean the oil circuit and check whether the idle motor has carbon deposits and should be cleaned.

Hello, if it is a manual transmission model, you can replace the clutch pressure plate, clutch plate, and disengage the bearing. If it is an automatic transmission model, first clean the throttle and replace the clutch when it is returned.

Hello, this situation may be caused by excessive carbon deposition in the engine, it is recommended that you clean the throttle first and replace the spark plug.

The possible causes of starting jitter are as follows

1. Ignition system problems Zhi Check the working condition of the spark plug, high-voltage wire and plate ignition coil right, the ignition system is not working well, and the spark plug flashing condition is not good, which will also lead to this kind of failure. Solution: Check whether the spark plug has too much carbon deposit, and replace the spark plug.

2. Unstable oil pressure If you have cleaned up the engine carbon deposits, washed the throttle, changed the oil cushion and spark plugs, etc., and still found that the body shakes when idling, it is recommended that you go to the 4S shop to check whether the fuel 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 poor, it will cause the body to shake. Solution: Check the oil pressure and replace the parts if necessary.

Low idle speed, or thin clutch plates, insufficient pressure plate pressure. Clean the idle valve.

There are generally several situations in the fault diagnosis of engine idle shake, the engine carbon deposition is serious and the most common reason for the car shake is that the engine has a general cleaning agent, which can remove carbon deposition and dismantle the oil to clean the carbon sludge, which is very convenient to use, and the suspension differentiation is not blocked, and the oil is miscible and will not lead to delamination, so as to clean your engine better and safer.

The reason for the idle shaking of the Suteng cold car: the most fundamental reason is that the combustion in the cylinder is not good, the power provided by the car is not enough, and the car will shake.

When the engine starts, the speed is automatically adjusted according to the water temperature. When the temperature is low, the water temperature is low, and the engine speed automatically becomes higher. At this time, the engine did not work at the optimal temperature, and the shaking was noticeable.

As the water temperature rises, the idle speed slowly falls back to normal and the jitter becomes smaller. If it's such a process, it's completely normal.

The temperature in the engine is not enough, the fuel and lubricating oil temperature are not enough, and more fuel should be injected during cold start to meet the power requirements. The larger the gap between the spark plugs, the smaller the ignition energy. At low temperatures, the atomization of the fuel is not as good as good, and the fuel requires a higher ignition trillion lead hidden energy.

If the car is used for a long time, the ignition gap of the spark plug can easily become larger, resulting in a decrease in ignition energy, which will affect the power performance and cause the car to shake. In addition, aging of the ignition coil, aging of the spark plug high-voltage wire, or leakage can also reduce the ignition energy. Both open-loop and closed-loop control suffer from inaccurate oil-gas mixing ratios.

In a closed-loop controlled car, the minimum operating temperature of the oxygen sensor is 370 degrees Celsius. If the car has just started, the oxygen sensor will not work because the temperature inside the exhaust pipe is below 370 degrees Celsius. At this time, the ECU misjudged, and its control of the oil and gas mixing and ignition time through the actuator was wrong, which reduced the power output of the car and caused jitter.

Millions of car purchase subsidies.

Volkswagen Suteng cold car starts shakingThe movement is clearly orange and regretfulAfter the rain, the idle speed is very shaky. It may be caused by insufficient combustion during start-up due to too much moisture in the weather or poor contact in the plug of some electrical appliances, and it should get better after normal driving for a period of time. The circuit is very susceptible to moisture, so it is recommended that you go to a professional store to check the circuit after rain.

In addition, many car owners reported that when the Sutar engine was idling, the left front door was obviously shaken when the left front door was opened. The phenomenon of engine idle instability and jitter is generally directly related to the fuel injection system, ignition system, and idle control system, so go to a professional repair shop for inspection as soon as possible.

Idling body shake is a common situation encountered by many car owners. If the owner finds that the body shakes significantly when starting the vehicle or stopping the vehicle but does not turn off the engine, it may mean that the vehicle has the following four conditions; 1. Serious carbon deposition in the engine, 2. Ignition system problems, 3. Unstable oil pressure, 4. Aging of engine parts.

The main reason for Volkswagen idle jitter;

1. The most common cause of car shaking is that the throttle valve is too dirty or the fuel injector has too much carbon.

2. When the carbon deposit inside the engine is too much, the gasoline sprayed by the cold start fuel injector will be absorbed by a large amount of carbon deposit, resulting in the mixture of cold start being too thin, making it difficult to start the potato banquet, in this case, only when the gasoline absorbed by the carbon deposit is saturated, it is easy to get on the car, 3. After the car, the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thicker, and the combustible mixture of the engine is dilute and thick, and Xiangwei causes idle shaking after cold start. The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon deposits will affect the smooth cold start. Severe idle vibration is generally caused by engine cylinder failure, aging or loose foot rubber, carbon deposits, fuel system failure, etc.

Workaround: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.

The causes and solutions of shaking and vibration when starting the Suteng cold car are: 1. The engine has serious carbon deposits. The very common reason for car jitter vibration is that the throttle valve is too dirty and the fuel injector has too much carbon deposit.

If there is too much carbon inside the engine, the gasoline ejected from the cold-start injector will absorb a lot of carbon. Due to the bending, the accumulated carbon needs to be removed immediately. 2. The engine lacks cylinders.

Engine cylinder deficiency mainly refers to the abnormal operation of more than one cylinder of the engine. The phenomenon is that there is a significant intermittent flow of automobile exhaust gas, and at the same time, the exhaust pipe shakes violently, and the engine shakes obviously, sometimes accompanied by a sudden sound. This is related to the ignition coil failure issue.

Therefore, the relevant parts of the ignition system need to be replaced. 3. The combustible mixture of the engine becomes thinner or thicker, causing idle vibration after cold start. The lower the temperature, the more oil is required for the cold start, and the more carbon is deposited, the more it will affect the success or failure of the cold start.

The front oxygen sensor should be checked and replaced. Engine vibration should be inspected and maintained immediately on the vehicle. Check whether the ignition system, air intake system, and fuel system are faulty, and if there is a fault, troubleshooting should be carried out immediately.