What causes car idle jitter?

There are several reasons for 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. The oil pressure is unstable, if the first 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.

Severe idle vibration is generally caused by engine cylinder failure, aging or loose foot rubber, carbon deposits, fuel system failure, etc.

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, 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.

Causes of engine idle jitter: common ones are excessive carbon deposition in the idle motor, dirty electronic throttle, low fuel pressure, and ignition system failure.

1.The spark plug is caused by the fact that the gap is too large for a long time or there is carbon deposit, internal damage, etc.;

2.The ignition coil of one of the cylinders was damaged, causing this cylinder to not work properly;

3.The internal short circuit of the gasoline pump makes the low-pressure fuel unable to reach the ** gasoline pressure normally, causing the engine to shake or stall;

4.There is air leakage in the engine intake system, which causes the engine to shake;

5.In the cold car state, the throttle, valve, and piston top are caused by excessive carbon deposit;

6.One of the cylinders of the engine, due to the poor sealing of the valve or the piston ring is stuck by carbon deposits, there is no cylinder pressure, resulting in engine shaking.

How to deal with the failure of the ignition system of the car?

You can go to an ordinary repair shop and ask the mechanic to remove the spark plug to see if the head of the spark plug is dirty and whether the electrode head is damaged, which we can see by ourselves. The second is to use a diagnostic instrument to check whether the high-voltage coil or ignition coil is not working.

Causes of idle jitter.

1. Ignition system problem to check the working status of the spark plug and ignition coil The spark plug is damaged and the car is shaken and the refueling is weak, the ignition coil is damaged by the start, the car is shaken, and the throttle should also be checked regularly.

2. The oil pressure of gasoline is unstable The pressure state of the fuel supply gauge is abnormal and unstable, which will lead to the error of the value of the sensor, which will lead to the idle shaking of the body.

3. The engine shake may be due to cracking and damage of the bracket glue.

4. The engine has carbon deposits.

5. The combustion caused by oil problems is not good.

Solution; , 3 belongs to the parts problem, you can go to the repair shop or 4S shop to check the fault code and accessories problems, throttle and other accessories should also pay attention to timely cleaning.

If there is no problem with the accessories, it is estimated that it is caused by the quality of the fuel, and the domestic fuel is bare oil, so it is necessary to use some additives to improve the quality of the fuel to eliminate this kind of jitter.

The causes of car idle jitter may be: faulty spark plug or ignition coil; Incorrect valve timing; uneven compression of the cylinder;

The valve seal is not tight, and there is air leakage; poor fuel pressure; Fuel injector plugging leakage; leakage between the cooling system and the cylinder; The air flow sensor is faulty.

What to do if the engine is shaking at idle.

The causes of idle jitter include serious carbon deposits in the engine, problems in the ignition system, unstable oil pressure, and aging engine components. If there is idle shaking, it is recommended that the owner clean the engine, replace the spark plugs, and check the oil supply pressure. Usually, the idle speed shake of the car is unstable, and the tachometer pointer fluctuates up and down, which is very unstable.

Idle speed generally has a certain range (about 1000 rpm - 1500 rpm). Idle speed that is too high or too low will lead to increased fuel consumption, while idle jitter can easily cause the engine to shut down automatically. Measures to deal with idle jitter:

1.Clean the oil circuit, check whether there is carbon deposits in the idle motor, and clean it. 2.

If there is too much carbon build-up in the spark plug, the spark plug can be removed for cleaning, and the spark plug can be replaced if necessary. 3.For the problem of idle jitter caused by unstable oil pressure, it is necessary to check and detect the leakage point of the oil supply system first, and then test the atomization effect of the fuel injector, and replace the corresponding parts if necessary.

The reasons for the idle shake of the car are as follows: 1. The engine has serious carbon deposits, and the most common reason for the shake of the car is that the throttle is too dirty or the fuel injector is too slippery. Solution: Clean the oil circuit and check whether the idle motor has carbon deposits and should be cleaned;

2. Ignition system problems, check the working conditions of spark plugs, high-voltage wires and ignition coils, poor ignition system work, and poor spark plug flashing conditions will also lead to this kind of fault phenomenon. Solution: Check whether the spark plug is too much carbon deposit, and replace the spark plug;

3. The oil pressure is unstable, if the engine carbon deposit has been cleaned, the throttle has been washed, the oil cushion and spark plug have been replaced, etc., and the body is still found to shake 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 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;

4. The aging of engine parts and the shaking of the car are also related to the aging of the engine foot (also known as the claw pad). The engine foot is actually the suspension system of the engine, and the engine foot is responsible for absorbing the subtle shaking of the engine during operation, 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. Solution;

Replacement parts. Millions of car purchase subsidies.

The specific causes and solutions of unstable idling after the car starts:

1.Intake manifold leakage: When the air that should not enter the intake manifold, gasoline steam gas, and combustion exhaust gas, the mixture is too thick or too thin, resulting in unstable idling of the car.

Solution: Check the manifold and replace it in time if there is any air leakage.

2.Excessive carbon deposition on the throttle: excessive carbon deposition on the throttle and surrounding air intakes, and changes in the cross-sectional area of the airway, which makes the control unit (check the transaction price|Matching|Preferential policy) Nianyun can not accurately control the idle air intake, which also causes the mixture to be too thick or too thin, resulting in unstable car idling.

Solution: The best way is to clean the oil circuit, regularly clean Chungaoxin, and use PNF fuel additives to solve the problems caused by carbon deposition. 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 car idle jitter are as follows:1The engine has a lot of carbon deposits, and the common cause of car shake is that the throttle is too dirty or the injector has too much carbon deposit.

Solution: Clean the oil circuit, check whether there is carbon deposit in the idle motor, and clean it. 2.

Problems with the ignition system. Check the operation of the fire spike plug, high-voltage wire and ignition coil. Poor ignition systems and poor ignition conditions of the spark plug can also affect this fault phenomenon.

Solution: Check whether the spark plug has too much carbon deposit, and replace the spark plug. 3.

The oil pressure is unstable. If the engine carbon deposit has been removed, the throttle valve has been cleaned, the oil pad and spark plug have been replaced, and the body body is still shaking when idling, it is recommended to go to the 4S shop to check whether the oil supply pressure and intake pressure sensors are normal. If the oil supply pressure of the oil pump is abnormal or the value of the intake pressure sensor is incorrect, it will basically cause the body to shake.

Solution: Check the oil pressure and replace the parts if necessary. 4.

The aging of engine parts, the shaking and vibration of the car are also related to the aging of the buried feet (also called claw pads) of the engine pants. I think the engine foot is the shock absorption system of the engine. The engine feet are responsible for absorbing slight shaking and vibrations when the engine is turning.

If there is a problem with the engine feet, these vibrations can be transmitted to the steering wheel and cab, causing wobble and vibration at idle. Workaround: Replace the part.

The specific causes and solutions of unstable idling after the car starts:

1.Intake manifold leakage: When the air, gasoline vapor and combustion exhaust gases that should not enter the intake manifold, the mixture is too thick or too thin, resulting in unstable idling of the car.

Solution: Check the manifold and replace it in time if there is any air leakage.

2.Excessive carbon deposition on the throttle: excessive carbon deposition on the throttle and surrounding air intakes, and changes in the cross-sectional area of the airway, which makes the control unit (check the price of the wheel|Matching|Preferential policies) can not accurately control the idle air intake, and Nianyun also causes the mixture to be too thick or too thin, resulting in unstable car idling.

Solution: The best way is to clean the oil circuit, clean it regularly, and use PNF fuel additives to solve the problems caused by carbon deposits. The quality of fuel Chungaoxin 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 the National VI car.

We can only gradually alleviate most of the problems by maintaining clean oil circuits.

There are many causes of idle jitter, but the most common ones are:

Circuit system. The throttle body is too dirty or malfunctioning itself;

Poor ignition coil contact or conduction (depending on the discharge);

Caused by abnormal ignition lines;

One or more ignition coils are faulty, burned, etc. (according to emissions);

Abnormal stepper motor;

Spark plug failure: such as the wrong calorific value, wrong model or need to be replaced;

The relevant control circuit is abnormal;

The anti-theft system is abnormal;

Fuel quality or substandard. For example, the quality of the fuel used, the heavy water content of the fuel, the large number of impurities, etc., lead to abnormal shaking of the engine working conditions.

Failure of oil pressure, abnormal oil pressure;

The electronic oil pump is faulty, the conduction is poor or the heating is abnormal;

Oil pipeline impurities are blocked; For example, the gasoline filter element is clogged or there are many foreign body impurities, the oil supply is not smooth, and the fuel pipeline is blocked, cracked, rusted or deformed (due to scratches or collisions, etc.).

Fuel filter failures, such as clogging or not being replaced for a long time;

Injector failures, such as poor atomization, clogging, or quality reasons;

Fuel rail pressure sensor failure;

Excessive carbon deposits in the engine of the engine;

Improper (or overdue) internal wear and tear or maintenance, etc.;

abnormal cylinder pressure; Incorrect selection of engine oil or viscosity that does not meet the standard;

wear or damage to individual components;

Valve abnormalities, such as stuck, air leakage, etc.

The water temperature is abnormal, and there is a fault in the water temperature sensor circuit, the sensor itself, etc.

The specific fault is subject to the actual vehicle test results, and the fault should be repaired in time to ensure that the fault can be solved in time and not spread, and to ensure the normal operation of the car under various working conditions.

Cause; 1. Check whether the ignition system is faulty. Generally, it is caused by the ignition coil or the aging of the spark plug, and the damaged ignition coil or spark plug can be replaced. The inspection of the ignition coil needs to use the computer to read the specific fault code, if the corresponding cylinder has a misfire, it is generally a problem with the ignition coil.

2. There is too much carbon deposition in the engine. In this case, it is recommended to clean the carbon deposits in the engine, especially the carbon deposits in the intake tract and cylinder of the throttle. The carbon deposits in the cylinder are mainly the piston position and the valve base position, and then rematch the throttle.

3. Oil circuit failure. In this regard, it is necessary to check whether the fuel supply pressure of the gasoline pump is normal, and if the oil supply pressure is unstable, it is necessary to replace the new gasoline pump in time.

Carbon deposition refers to the gum (the main components are hydroxy acid, asphaltene, refueling, etc.) produced when the fuel cannot be completely burned in the engine, so that the black substance similar to cinder is continuously accumulated in the fuel injector, throttle, oil pipeline, spark plug and other parts under the action of repeated high temperature of the engine, that is, carbon deposition.