The engine shakes badly, and the fault indicator will still be displayed?

1.The engine shakes severely, and sometimes the fault indicator flashes occasionally. Many people suspect that there is a quality problem with the vehicle, but the real cause is that the fuel supply system is contaminated or clogged due to unclean fuel.

2.Some of today's advanced vehicles are equipped with exhaust emission monitoring systems, which are very sensitive to detect vehicle emissions and fuel cleanliness, so the use of unclean fuel will trigger fuel supply. Ignition.

Emissions of system pollution, which in turn leads to the illumination of engine fault lights and varying degrees of engine shake.

3.After a thorough cleaning of the contaminated system, the situation can be improved by continuously adding gasoline with consistent performance and adding a certain amount of oil circuit cleaner.

If there is a lack of cylinder and a fire, the instrument will indeed show that the exhaust emission light is on and the EPC warning light is on.

The engine shakes badly, and the fault indicator will still be displayed? Oil problem, the engine of this car is good, the quality of fuel requirements is high, you can use a general fuel additive fuel cleaner, the underground tank of the gas station is closed so well, it will be cleaned once in 2 months, not to mention our car, the fuel tank seal can not catch up with the underground oil tank, the oil tank oil is not still to be added to the fuel tank, that is not just a coincidence, the oil is not too clean. The executive version has encountered a new car body, and it would be good to add Siyoupu fuel additives to the store.

The engine shakes and the light is on when the fault is serious, and generally speaking, the most likely situation in this situation is that the engine is out of cylinder.

1. Some people may ask what is the lack of cylinder, generally speaking, your car is a four-cylinder engine, and one or more of them does not work, which is called lack of cylinder. The shape regrets that the engine lacks cylinders, and the common reason is nothing more than the spark plug ignition with poor normalization, or the ignition coil is damaged!

In this case, the computer can generally use the computer to read the fault code to determine which cylinder is damaged, if there is no decoder, you can also use the cylinder breaking method to determine, in the case of the car, unplug the ignition coil in turn, unplug the engine without obvious shaking of the cylinder is the broken cylinder, buy a new ignition coil and replace it!

2. Body shaking, this situation is generally in the process of driving, feeling that there is shaking in front or behind the vehicle, first of all, check whether the tire is deformed, especially the inside of the tire, long-term wear and tear will cause the tire pattern to be uneven, and the body will shake, accompanied by abnormal sound!

3. The steering wheel shakes left and right, this common rolling at high speed, the steering wheel shakes left and right, this situation is generally the tire needs to be dynamically balanced, and it is not excluded that the deformation of the steel rim is caused, but the dynamic balance can check whether the steel rim is deformed!

1. Identify the cause of the failure. For diagnostics of such faults in which the engine does not start, the battery should be tested first. It is necessary to find out if the engine does not start because the battery is insufficient.

2. Detect ignition timing. Timing belt slippage is the root cause of the failure that there is no electric spark and the engine cannot start.

3. Detect the starting system. For faults such as engine failure, the first thing to do is to detect the circuit in the engine starting system. From the perspective of the most basic composition, the mountain distribution circuit of the starting system generally includes the following basic parts, that is, the battery, the starting motor and the cable connecting these components.

Of course, in addition to this, ignition switches, starter relays or solenoid coils, as well as in-vehicle anti-theft systems, are also important components of the starting system.

4. Detect the quality of electric sparks. Once the circuitry of the starting system has been tested and proven to be fine-tuned, attention should be focused on why the engine is not working. Generally speaking, the ignition system of the engine is tested first, which is also the easiest inspection job.

In early ignition systems, you could easily remove the ignition coil and use a spark detector to detect if the spark was normal. When choosing an EDM detector, it is preferable to have an adjustable detector rather than a fixed design, as it allows you to adjust the detector to a smaller gap so that you can tell if there is no spark at all, or if there is a spark but it is weak.

5. Detect the fuel system. The diagnosis of the fuel system can be divided into two parts: the diagnosis of the fuel supply system and the diagnosis of the injector circuit system.

The fuel supply system can be detected by measuring the flow and pressure of the fuel. The best way to measure fuel flow is to inspect the line when there is a load in the fuel supply line.

1.When a vehicle shakes out, the throttle and fuel injector should be checked first. If you find that the throttle valve is too dirty or the fuel injector has too much carbon deposit, it should be cleaned in time.

2, the engine pad aging, car shaking is sometimes related to the aging of the engine foot, the engine foot is actually the shock absorption system of the engine Peiling motive, the engine foot is responsible for absorbing the subtle shaking of the engine when running, if there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel, the cab, resulting in the idle engine in the idle state, when the car electrical system is turned on, it is most likely to cause the vehicle to shake. The engine will increase the load due to the opening of the electrical system, causing the idle speed to slip, in order to compensate for the jitter caused by the idle slide, the engine will automatically pull up the speed a little. Therefore, when the car's electrical system is turned on, especially when the car air conditioner is started in the summer, the engine often shakes.

If the jitter in the idle state does not decrease due to the operation of the on-board null key brightness compression and brightness machine, this jitter is likely to be caused by the aging of the engine foot, and a new engine foot needs to be replaced in time. Uneven tire weighting is also a cause of judder.

3. The aging and deformation of tires and the shaking of the chartered car during the journey are far more worrying to the driver than the shaking during idling. Most of the shake of the vehicle while moving is related to the drivetrain, and one of the most basic links is a problem with the tires. I hope the above will help you, hopefully!

Hello, the current number of people consulted may not reply in a timely manner, if it is a vehicle failure problem, it is recommended to use the computer to detect the specific cause of the failure, search for "car master" can be consulted at any time to ask the car to ask the question, 24 hours ** answer.

1.A dirty throttle can cause idle jitter.

2.A faulty spark plug can cause the vehicle to shake at idle.

3.The engine has a cylinder that is not working, which can also lead to idle shake, and there will also be vehicle shake when the vehicle accelerates at low speeds.

4.The rubber parts inside the engine mount and transmission bracket are aging and driving, causing the vehicle to idle and shake the hand speed. Min pretended to be suspicious.

The engine fault sign is on and the lights are shaking, what's going on? What's going on with the engine fault sign lighting and shaking? The engine fault sign lights up and shakes the reason for the terrible light:

1. Ignition system problems, if the ignition system of the car fails, it will cause problems such as poor ignition system work and poor spark plug flashover, which will lead to unstable idle failure when the car is idling. The solution is to check the working condition of the spark plug, high-voltage wire and ignition coil, whether there is too much carbon deposition in the spark plug, and once found, clean or replace the spark plug immediately; 2. Poor fuel quality will damage the performance of the engine, which will cause the problem of idle jitter. The solution is to clean the throttle valve of the car in time; 3. The carbon deposit inside the engine is too much, and the gasoline sprayed out at the cold start injection head will be absorbed by a large amount of carbon deposit, resulting in the cold start mixture being too thin, making it difficult to start.

In this case, it is easy to get on the car only when the carbon absorbed steam is saturated, and the engine's can be diluted and thick, resulting in idle shaking after cold start. The solution is to clean the oil circuit and check whether the idle motor has carbon deposits that should be cleaned. @2019

The reason why the engine failure light is on.

1. The combustion state is not good.

Poor engine combustion condition is the main reason why the engine failure light is on. In the design of the car, in order to ensure that the engine is in good working condition and ensure the normal working life of the engine, an oxygen sensor is designed and installed on the engine to monitor the combustion state of the engine.

2. The fuel quality is not good.

Many riders who find that the engine fault light is on have a feeling: that is, the engine fault light suddenly turns on after adding a tank of fuel. Because the engine has requirements for the quality index of oil, especially as the requirements for the engine are getting higher and higher in various specifications, the quality index of the oil is also getting higher and higher.

3. The engine cylinder is not clean inside, and there must be some carbon deposits inside the engine pants after a certain period of use, which will cause the engine design parameters to change, and its properties are unstable and heat is accumulated, and the accumulated heat will lead to disorderly ignition of the engine, thereby causing engine detonation. In this case, the engine fault light is also illuminated.

The engine fault light is on the solution.

1. Clean the engine.

Once the engine failure light is on, the owner should clean the engine in time, and there are currently two correct cleaning methods:

1) Go to the repair shop to clean the carbon deposits with a special cleaning agent.

2) Clean the entire fuel system with good fuel additives, including removing carbon deposits in the cylinder.

2. Add higher grade gasoline.

After the engine cleaning, because the compression ratio of the current automobile engine that meets the national IV emission standard is generally above, this kind of car is not suitable for long-term gasoline below 95. In order to keep the engine in good working condition, the owner can choose to add 95 or 97 gasoline, which can usually solve the problem of the engine failure light on.

3. Improve fuel quality.

Hello! The engine fault light may be a temporary failure, which is manifested in the fact that the car is driven without obvious symptoms, and the engine fault light is on for a period of time and off for a period of time. Temporary failures may seem insignificant, but they can also be "hidden killers".

Therefore, the owner should not ignore it and should find time to check the vehicle. If the fault light is always on and accompanied by other abnormal conditions, including the engine cannot be started, easy to stall, engine shaking, power dropping and other problems, you should contact a 4S shop or repair shop for maintenance as soon as possible.

Sensors, maintenance issues, oil problems, intake problems, poor combustion of the mixture, etc., can all cause the engine fault light to illuminate. The engine is the core component of a car, and the corresponding fault light is on, which either means that there is really a fault; Either the engine is experiencing a false signal false alarm failure. Don't underestimate the engine fault light, it may not have a significant impact in a short period of time, but if left unattended for a long time, the vehicle may eventually have a serious malfunction.

1. Sensor.

Damaged sensors, poor contact, or signal interruptions cause the car's ECU to receive incorrect engine data and finally turn on the engine fault light with a misjudgment. There are many automotive sensors, the core of which are water temperature, crankshaft position, air flow, inlet air temperature, oxygen sensor, etc. Solving the engine failure caused by the sensor is very simple, and you only need to replace or adjust the sensor that has the problem.

Oxygen sensor: There are two oxygen sensors, respectively before and after the three-way catalytic converter, and the role of the oxygen sensor in different positions is different. The front oxygen sensor needs to detect the air-fuel ratio of the engine under different operating conditions, and the data will help the car computer to adjust the fuel injection amount and calculate the ignition time.

The post-oxygen is used to detect the working condition of the three-way catalytic converter. An over-concentrated or over-dilute mixture is a direct effect of an oxygen sensor problem and can also illuminate an engine failure light.

Air Flow Sensor:

Also known as an air flow meter, its role is to calculate the amount of air and convert it into an electrical signal, which is determined by the engine computer based on the optimal air-fuel ratio. Similarly, the effect of an abnormal air flow sensor is that the mixture is too thick or too thin, causing the engine failure light to illuminate.

2. Oil. In fact, the oil of the car has strict requirements, and we only need to fill the qualified oil to meet the normal operation of the engine. Although the unqualified oil can support the operation of the engine, the engine is uncomfortable to run, so the wear will be accelerated, and the engine fault light will also be lit.

3. Mixed gas combustion.

Problems such as faulty spark plugs, faulty ignition coils, faulty fuel pumps, and clogged oil circuits can all lead to poor combustion of the mixture. The consequence of poor combustion of the mixture on the engine is carbon deposits or knocking, which causes the engine fault light to illuminate. Measures such as replacing spark plugs, cleaning oil circuits, and cleaning up carbon deposits have a certain chance of eliminating faulty lights.

Hello! It is likely that a certain cylinder has misfired or a certain cylinder is not working well. It is also possible that it is because of the fuel injector and the three-way catalytic converter.

There is a problem. There are many reasons for this, such as incorrect oil-gas mixing ratios due to long periods of neglect of maintenance.

There will be many sensors on the body of the car to detect the car, and when the sensors in a certain part of the car "sense" that there is a problem with a certain part of the car, the engine fault light will light up. If you want to know what the specific reason is, you need to use a computer to detect it to know that there is a problem with the state resistance.

If the car can still run normally, you should go to a 4S shop or a professional auto repair shop as soon as possible, so that professionals can first determine that there is a problem and repair it in a targeted manner. In general, as long as you connect a portable diagnostic instrument, you can easily read the fault code and find out what the problem is.

If the car is smoky and difficult to start, don't start it again, call rescue** and find a tow truck.

Other reasons why the engine failure light is on:

1. The poor quality of gasoline leads to insufficient combustion of the mixture in the cylinder; 2. The engine mileage is too long, and the spark plug.

weakened operating characteristics; 3. Carbon deposits on the top of the air intake and piston.

There is too much sail rolling, resulting in poor atomization; 4. Some sensor computer boards themselves are faulty; 5. The vehicle is too old and the machinery is aging.