What is the cause of the engine idling for a while?

There are four main causes of body shake at idle:

1.The engine has serious carbon deposits.

The most common cause of car shake is a dirty throttle or excessive carbon build-up in the fuel injector. When the carbon deposit inside the engine is too much, the gasoline sprayed out by the cold start fuel injection head will be absorbed by the carbon deposit in large quantities, resulting in the mixture of cold start being too thin, making it difficult to start, 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 after the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, causing idle shaking after cold start.

In addition, the lower the temperature, the greater the amount of oil required for the cold start, and the more the presence of carbon deposits will affect the smooth cold start. The solution is to clean the oil circuit and check whether the idle motor has carbon deposits that should be cleaned.

2.Problems with the ignition system.

Check the working condition of the spark plug, high-voltage wire and ignition coil, the ignition system is not working well, and the spark plug is not in good condition and the spark plug is not in good condition. The solution is to check the spark plug for excessive carbon accumulation and replace the spark plug.

3.The oil pressure is unstable.

If you have cleaned the engine charcoal, washed the throttle, changed the oil cushion 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, if the oil pump supply pressure is abnormal or the intake pressure sensor is wrong and the work is not good, the body shakes will be caused by abnormal oil pump pressure pressure or wrong intake pressure sensor and poor work. The solution is to check the oil pressure and replace the parts if necessary.

4.Aging of engine components.

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.

Fuel consumption becomes higher, and carbon deposits in power will cause insufficient combustion of gasoline, causing engine shaking and unstable speed. Difficult to start, easy to stall, high engine temperature, etc. Now, with the development of science and technology, it is also possible to solve the engine shake and unstable speed by not hanging the bottle.

Difficult to start, easy to turn off the problem.

If there is a problem with the idle motor, it will be fine after replacing it [If there is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, check the idle motor, clean the throttle [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

It is basically caused by the intermittent lack of cylinder work in the engine, and it is recommended to check the circuit oil circuit and spark plug.

What is the reason for the unstable idling speed of the car, up and down? 1: Ignition system failure causes the internal energy of the system to drop.

2: The intake manifold is leaking, and the speed of the car will be unstable. 3：

If there is too much carbon deposition on the throttle, the idle speed of the car will be unstable. 4: Fuel system failure causes the car to idle unsteadily.

A burst of engine idle shake means that the vehicle has one of three conditions:

The first is the unstable oil pressure. If you have cleaned the engine carbon deposit, washed the throttle, changed the oil cushion and spark plug, etc., and still found that the body shakes when idling, it is recommended to go to the 4S shop to check the fuel supply pressure and intake pressure sensor, 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. The best solution is to check the oil pressure and replace the parts if necessary.

The second is the aging of engine parts, such as the aging of engine feet, which may cause the body to shake. The engine foot is actually the shock absorption 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.

The third is that the engine throttle valve is too dirty or the fuel injector is too much carbon deposited and causes shaking. When there is too much carbon deposit, the gasoline sprayed by the cold start injector will be absorbed by the carbon deposit, resulting in the cold start mixture being too thin and difficult to start. After the car hits the car, the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine for combustion, so that the mixture becomes thicker, and the combustible mixture of the engine is dilute and sometimes thick, causing idle shaking.

The solution is to clean the oil circuit and check whether the idle motor has carbon deposits and should be cleaned.

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.

Cylinder pressure is sufficient, no air leakage, ignition coil, spark plug, fuel injector excludation, it is necessary to check the machinery, camshaft, valve clearance will be affected, and the cylinder pressure is not affected.

What is the cause of the engine idling for a while?

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

Hello, what kind of car are you, how much displacement, what did you do, or did you not do anything, is there a fault code?

07 Odyssey engine shake I feel that there is a cylinder that does not work well, but it is all checked and there is no problem, the cylinder pressure is enough, and there is no fault.

Is there a fault code, is there a lack of fire data in the data stream, and does it run normally.

No faults** No lack of fire data flow Runs normally I checked that the spark plug of the 3 cylinder was black.

That means that the 3-cylinder has bad combustion, and the pressure of the 3-cylinder cylinder is much.

The cylinder pressure is enough for 9 pressures.

Then you have to check if there is an air leak that causes poor work.

I also checked for air leaks, but I didn't.

Cylinder pressure is sufficient, no air leakage, ignition coil, spark plug, fuel injector excludation, it is necessary to check the machinery, camshaft, valve clearance will be affected, and the cylinder pressure is not affected.

Is this car fuel injector easy to break?

There is also a possibility that the injector will be bad, and you can reverse it with other cylinders to troubleshoot the problem.

If there is a problem with the valve camshaft, the cylinder pressure should not be enough.

If there is a slight problem with the camshaft and valve clearance, the cylinder pressure is not affected, you can adjust the injector first to eliminate the outside one.

If the throttle replacement does not improve, then it is necessary to consider air leaks, including valve leaks and cylinder head leaks, pistons and fuel injectors may also be stuck. Faulty water temperature or air flow sensors can also cause this phenomenon. Incorrect crankshaft position sensors can also cause jitter.