What causes engine shake?

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.

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 supply pressure is not normal or the intake pressure sensor is incorrect, it can also cause the body to shake when idling.

4. 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 beginning of 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 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 lead to no good fuel can 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.

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.

The engine of a car is composed of many parts, and the connection with the body is not welded, but fixed to the body by engine mounts and gaskets. Therefore, engine tremor may be due to gasket aging, internal parts problems and other reasons, we can determine through the troubleshooting method:

1.Air filter dirty:

If the air filter is not replaced in time, the engine will shake due to low idle speed caused by insufficient air intake.

High-voltage line break: High-voltage line breakage can affect ignition and cause engine shake, and the resistance can be measured with a multimeter to replace the one that is obviously several times larger.

2.Spark plug life:

The ignition efficiency of the spark plug is significantly reduced and can affect the ignition, which is the most common failure, and the spark plug can be replaced completely.

Low idle speed: The engine idle speed value has been set in the computer, and when the number of revolutions is low to a certain range, the car computer will automatically adjust it. If the idle speed is too low and the jitter is beyond the control range of the computer, some cars have adjusting screws on the throttle to adjust the idle speed, and some cars can not adjust, this kind of car can check the idle valve, throttle, air flow meter, vacuum sensor, adjust the ignition time (car with distributor), you can increase the idle speed.

Low idle speed can occur even when the water temperature is low, so you can check and replace the thermostat.

3.The water temperature is not normal:

High engine water temperatures can lead to earlier ignition, a change in the oil-air mixing ratio, a thinner oil viscosity, and a deterioration in lubrication. The general fault cause is the jitter caused by the lack of antifreeze, the thermostat cannot be opened, the fan does not rotate, and the temperature of the temperature control switch is inaccurate.

4.Fuel injector clogged:

The fuel injection hole of the fuel injector is blocked, causing the inconsistent fuel injection volume of each fuel injector, resulting in the inconsistent work of each cylinder and causing the engine to shake. The solution is to remove it and clean it.

5.Carbon deposits, grease blockages:

The throttle, idle valve, and air intake hole will be blocked by carbon deposits, oil scale, and poor air intake after a period of use, which will affect the stable idle speed and shaking. It is necessary to inspect and clean the above parts with cleaning agent, and there is no need to remove them for cleaning.

6.Cylinder pressure is low:

If the engine has a cylinder that does not work well, there will be a lack of cylinder, and the engine will shake. Check the cylinder pressure with a cylinder pressure gauge.

Engine jitter, from the circuit point of view, "resistance and leakage jitter", that is, the high resistance of the line will travel, and the circuit leakage will shake. Speaking from the oil road, the thick swim is shaking; When the mixed steam is thick, the car will be traveled, and the mixed steam will tremble. But it is also common for the engine to shake badly, mechanically speaking, individual cylinders do not work.

Dithering? Can it be felt clearly in the car? If you open the engine compartment and see it, it's nothing, if you can see the body shaking, it means that your engine is not running properly, for example, it is missing cylinders, for example, it is not well supplied with oil, etc.

It may be that the spark plug has not been replaced or the fuel injector is not injected, if it is not the above two situations, please go to the nearest repair shop or professional 4S shop to check and make a specific maintenance plan.

Engine shake may be caused by the resonance of the car body.

The automobile engine is the device that provides power for the car, is the heart of the car, and determines the power, economy, stability and environmental protection of the car. According to different power**, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrids.

The causes of engine shake are as follows:1. Engine cylinder shortage: 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 of the car and violent shaking of the exhaust pipe, so the engine shaking can be clearly felt, sometimes accompanied by a sudden sound.

This is mostly related to ignition coil failure.

2. Aging or loosening of the foot glue: The foot glue is the rubber block between the engine and the frame. Its function is to reduce the vibration and cushioning of the engine when it is working, and to fix the engine.

Once these machine feet are aged or loosened, the vibration of the engine will become very violent, and the effect will be much weaker after replacing the machine feet again.

3. Carbon deposits: Carbon deposits are always unavoidable in automobiles, including cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, intake carbon deposits, etc. When there is too much carbon deposit inside the engine, it will affect the ignition energy, air intake efficiency and mixing ratio of the car, resulting in the unstable power output of the car and the phenomenon of jitter during idle and acceleration.

It is recommended to go to the 4S shop to clean the engine.

1. The engine has serious carbon deposits.

Jitter that causes severe damage to the car is the most common injector throttle over-dirt or excessive carbon build-up. Excessive carbon deposits inside the engine, the gasoline in the cold start injection head discharges the absorbed carbon, which causes the cold start mixture to be too thin, making it difficult at starting, in this case, only until saturation absorbs the carbon gasoline, easily to the car, the car is adsorbed in the soot gasoline will be sucked into the vacuum suction cylinder of the internal combustion engine, and the air-fuel mixture thickens, when the lean combustible mixture is enriched when the engine is cold started to make the idle shake. The lower the temperature, the more amount of cold start oil required, and the more carbon is present or does not affect a smooth cold start.

2. Ignition system problems.

Check the operation of the spark plugs, high-voltage wires, and ignition coils. Poor working condition of the ignition system and runout of the spark plug can also lead to this failure.

3. The oil pressure is unstable.

If you clean the carbon deposits from the engine, clean the throttle, replace the oil pads and spark plugs, and your body is still shaking when idling. It is recommended that you go to the 4S store to check that the fuel** pressure and intake pressure sensors are normal. If the ** pressure of the pump is not normal or the error and poor work of the inlet pressure sensor will cause the body to shake.

At this time, the oil pressure should be checked and the parts should be replaced if necessary.

4. Aging of engine parts;

Car shake is also associated with the aging of the engine feet, also known as claw pads. The engine feet are actually the shock absorber system of the engine. The engine feet are responsible for absorbing slight shakes from the engine while working.

If there is a problem with the engine feet, these vibrations can spread to the steering wheel and cab, causing jitter when idling. At this point, the parts should be replaced.

The common causes of engine shake are: 1. Carbon deposition needs to be solved by cleaning the oil circuit, throttle and fuel injector. 2. If the ignition system fails, it is necessary to check the spark plug, cylinder wire, ignition coil, usually the cylinder line is leaking, and the spark plug has carbon deposits, which will appear to shake and be replaced to solve.

3. The bracket pad is damaged, which is easy to cause resonance, jitter and jumping. It is recommended to line up at 1-3 o'clock.

Seven causes of engine shake.

First, the air filter is dirty

The air filter is designed to protect the engine to reduce wear, generally replaced in about 10,000 kilometers, if the replacement is not timely, there will be insufficient air intake to cause low idle speed, and the engine shakes, as long as the filter element can be replaced.

High-voltage line break: High-voltage line break refers to the high-voltage wire core break, which can affect the ignition and cause the engine to shake.

Seven causes of engine shake.

2. Spark plug life:

The spark plug has a lifespan, and the ignition efficiency is significantly reduced after more than 3-40,000 kilometers, and can affect the ignition, which is the most common failure.

The engine lacks cylinders.

Engine cylinder lack mainly refers to the engine has one or more cylinders are not working normally, which is generally manifested as: the exhaust gas flow of the car has obvious intermittent gas, and the exhaust pipe shakes violently, and the engine shake can be clearly felt, sometimes accompanied by a sudden sound. This is mostly related to ignition coil failure.

The foot glue is aging or loose.

The foot glue is the rubber block between the engine and the frame. Its function is to reduce the vibration and cushioning of the engine when working, and to have the effect of fixing the engine. Once these feet are aged or loose, the engine shakes dramatically.

The effect will be much weaker after this re-replacement of the foot glue.

Carbon deposits. When the carbon deposit inside the engine is too much, the ignition energy, intake efficiency, and mixture ratio of the car will be affected, resulting in the unstable power output of the car, and the shaking phenomenon will occur at idle speed and acceleration. This is recommended to go to the 4S shop for the engine cleaning project.

Fuel system failure.

Adding an inappropriate fuel label (e.g., 93 to 90) will result in a decrease in the output of the car and a decrease in power; Or due to the blockage of the vent hole of the fuel tank cap, the fuel tank switch, the fuel filter and the oil pipe between the fuel tank and the carburetor are partially blocked, which cannot meet the required oil volume, resulting in the mixture being too thin and the engine shaking. It is recommended to use the fuel label specified by the manufacturer and maintain it regularly.