BMW X5 accelerates to between 70 and 80 miles and the body shakes what causes 5

According to your fault description, there is a problem with the dynamic balance of the lower tire. You need to do a dynamic balancing of the tires, after doing the dynamic balancing, and then you try the car again, the cost of doing a dynamic balancing is about 30 yuan.

If the BMW X5 car accelerates seventy or eighty miles, it is recommended to consider checking whether the tire pressure is normal, and then you should do a four-wheel alignment.

In this case, it is advisable to check if the tire pressure is normal. It is also possible that the engine has too much carbon deposit.

Hello such a phenomenon, first of all, check whether there is a problem with the tire pressure, and then do a four-wheel alignment for the car.

If this is the case for you, it is best to do a dynamic balancing of the wheels and a wheel alignment of the vehicle.

Tire balancing needs to be done.

Hello, this situation is generally the deformation of the transmission shaft, it is recommended that you go to the repair shop to overhaul the transmission shaft.

Then I tell you about this situation, I personally recommend that you go to a local repair shop or 4S shop to do a four-wheel alignment. The effect is relatively good.

Hello, for this situation, it is mainly caused by poor tire dynamic balance, it is recommended that you go to the repair shop to do the tire dynamic balance.

Consider the problem of the transmission shaft. It is advisable to go to the repair shop to check it out.

Hello, this problem needs to be distinguished, whether the car is shaking or the steering wheel shakes when the brakes are pressed, if it is a car shake, it is recommended to do four-wheel dynamic balancing.

If the brakes are shaking, it is recommended to check the brake pads and brake discs of the two front wheels.

The West Heaven is extremely comfortable.

Regarding the question you mentioned, if the vehicle is driving to about 80-90 km h, the vehicle has a steering wheel shake, and the fault is not related to whether the vehicle is accelerating or decelerating at that time, but only related to the speed. This failure is caused by a dynamic imbalance of high-speed rotating parts with large masses, including: tires, steel rims, half shafts, etc.

In the process of driving, the vehicle will inevitably cause the deformation of these parts, thereby changing their dynamic balance, even if there is no obvious deformation, due to the attachment of some sediment-like foreign bodies, it is enough to cause the vehicle to shake. It is recommended that you not only do dynamic balancing, but also check and replace deformed parts first, such as steel rings, half shafts, etc.

Car steering wheel.

Shaking is very common, and some car owners can feel strong steering wheel shake when driving the car at high speeds of more than 80-100km h. In this case, most of the problems occur in the tires of the car, because the uneven distribution of the mass of the whole part of the tire will cause the wheels to rotate at high speed, and there will be a dynamic imbalance state, which will cause the steering wheel of the car to shake seriously while driving. In this case, it is necessary to align the car tires on four wheels.

and dynamic balancing, and in serious cases, the tires should be replaced.

In addition to the reasons for car tires, it is also possible that the shock absorber is the damper.

Faults, frame deformation, excessive engagement clearance of the main and driven gears of the final reducer, etc. If the steering wheel shakes when braking while driving, it is likely that the brake disc may be caused by too much braking force or too often.

The brake pads overheat and deform when cold, causing the steering wheel to shake.

Generally, the symptoms can be solved after replacing the brake discs and brake pads. If the speed of the vehicle is not fast, but the steering wheel shakes, it is possible that the steering belt of the mechanical steering system will slip when the belt is too loose, which will also cause the steering wheel to shake, and there will be shaking and abnormal noise when the steering transmission system is loose and the gap is too large, but this situation is rare.

It is recommended to do a four-wheel dynamic balance package, hope [if you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, when the steering wheel shakes, the dynamic balance is not done, go to the tire shop to do the dynamic balance of the two tires in front of you. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, it is recommended to go to the pit station to check the chassis, and if there is nothing to do, just make a four-wheel dynamic balance. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, it is recommended to check the tires first, there are still a lot of slight deformation of the tires of this car, by the way, check the chassis, I hope to help you [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

The dynamic balance of the front tires is unbalanced. Just balance the four tires. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

The dynamic balance of the tires has changed, just make a dynamic balance of the four tires! [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Generally, it is good to do the dynamic balance of the front wheels, it is best to do 4 together, and finally the positioning and low disk [If the car has a problem, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, please drive to the repair shop to check the chassis first if you normally do a front wheel dynamic balance on it, we specialize in solving all kinds of incurable diseases, thank you for your support [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Check the ball head of the chassis. Let's do the tire dynamic balancing again [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, first check whether the tire hub is deformed Whether there is mud or something stuck to the wheel hub If there is no problem, go to do a dynamic balance I hope it will help you [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

The most common fault with jitter when accelerating is the spark plug.

There was damage, the spark plug was not ignited due to the wear of the spark plug pole line, the mixture was not fully burned and the acceleration jitter was carried out, and there was a crack in the ceramic part of the spark plug, which caused the spark plug to not ignite, and a cylinder that did not work would also lead to acceleration jitter.

1. The most common fault of jitter during acceleration is that the spark plug is damaged, the spark plug ignition is insufficient due to the local wear between the spark plug poles, the acceleration is shaking due to insufficient combustion of the mixture, and there is a crack in the ceramic part of the spark plug, which causes the spark plug not to ignite, and a cylinder that does not work will also lead to acceleration jitter.

2. The quality of gasoline is not good, resulting in poor atomization effect of the fuel injector, and the mixture is not fully burned in the cylinder, so it will also lead to idle shaking.

When the car accelerates and shakes at a speed of 60 to 40 per hour, the first thing you should check is whether there is too much carbon deposition in the engine after a roll, which is to see whether the bench tires of the big rough front car need to be dynamically balanced.

BMW gearbox is often based on the fiber base Beifeng to see the fault: 1. During driving, the car hangs D gear and crashes, and 5 gears fall to 4 when it crashes; 2. After the car starts, there is obvious impact damage from 2nd gear to 3rd gear; 3. The car shakes when it is 40-60 yards while driving; 4. When the car is on the road, the instrument prompts that the transmission system is faulty; 5. Acceleration is weak, the car does not upshift when running, and locks the gear (professional name: skidding).

When the car accelerates and shakes at a speed of 60-40 per hour, the first thing to check is whether there is too much carbon deposit in the engine, that is, whether the tires of the car need to be shaken and balanced.

The reasons for the unstable engine idling are: high engine carbon deposition rate, low air filter, ignition energy, abnormal water temperature, carbon deposition at the valve and air intake, and blocked fuel injectors.

The specific causes of unstable and shaky engine idling;

1.Excessive carbon deposition in the engine: When there is too much carbon deposition inside the engine, the gasoline sprayed from the fuel nozzle of the starting vehicle will be absorbed by a large amount of carbon deposition, resulting in the mixture being thin and difficult to start. It is only when the gasoline absorbed by the carbon deposits is saturated that the vehicle is easy to start.

Solution: It is recommended to clean the engine carbon deposits frequently.

2.Air air filter: If not replaced in time, it will cause insufficient air intake and reduced engine idling, which will cause engine shaking.

Solution: Replace the air filter.

Fuel requires high ignition energy, and a large spark plug gap will lead to a lower ignition energy, which in turn will affect the power and make the vehicle shake.

Solution: Replace the spark plug.

4.Abnormal water temperature: High engine water temperature can lead to earlier ignition, which can change the air-oil mix ratio and make the oil viscosity thinner (less lubricatable). The causes of abnormal water temperature are: insufficient coolant, faulty thermostat, faulty fan, and inaccurate temperature switch.

Solution: It is recommended to go to the 4S store for inspection and maintenance.

5.Carbon build-up in the valves and intakes: If carbon deposits occur in the valves and intakes in the combustion engine, jitter can occur.

Solution: Clean the valve and inlet carbon deposits.

6.Plugged injectors: Plugged injectors can cause inconsistent injection of fuel into each injector, resulting in different work done by each cylinder, which can cause the engine to shake.

Solution: Regularly use fuel cleaning products containing PNF, clean the oil circuit and carbon deposits, unblock the injector, and replace it if necessary.

The main reason for the shake when the BMW X6 accelerates to 100 h is the tire dynamic balance problem. It is recommended to do four-wheel dynamic balancing and check whether the rim is deformed. Of course, it may also be due to serious carbon deposits in the engine, ignition system problems, unstable oil pressure, aging engine components, etc.

First, the engine has serious carbon deposits.

The most common cause of car shake is that the throttle is too dirty or the injector has too much carbon. When there is too much carbon deposition inside the engine, the gasoline emitted by the cold start injector will be absorbed by a large amount of carbon deposit, resulting in too thin cold start mixture and difficult starting. In this case, it is easy to start the car only when the gasoline adsorbed with carbon deposits is saturated, and the gasoline adsorbed on the carbon deposits after starting the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, so that the mixed positive attack will become thicker, and the combustible mixture of the engine will become thinner and thicker, resulting in cold start.

The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon will be deposited, which will affect the success of the cold start.

Second, the ignition system problem.

Check the working conditions of spark plugs, high-voltage wires and ignition coils. If the ignition system is not easy to use, the spark plug does not jump, and it will also cause such a failure.

Three. The oil pressure is unstable.

If the engine carbon deposits have been cleaned, the throttle valve has been cleaned, the oil pads and spark plugs have been replaced, etc. And if you still find that the body shakes when idling, it is recommended to go to a 4S shop to check whether the oil supply pressure and intake pressure sensors are normal. If the oil pump supply pressure is abnormal, or the intake pressure sensor has the wrong value, it will work poorly, which will cause the body to shake.

Four. Aging of engine components.

Car jitter is also associated with the aging of the engine feet. 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.

1. When the driving speed is between 80 kilometers and 90 kilometers per hour, the steering wheel appears.

Jitter, and the speed above 90 km/h returns to normal. Most of this situation is due to tire deformation or the vehicle's drivetrain is bent, and it is necessary to check the positioning angles of the front wheels and the toe-in.

whether it meets the requirements, and if it is inaccurate, it should be adjusted; Set up the front axle to test the wheels, check the static balance of the wheels and whether the tires are too deformed, if the deformation should be replaced.

2. When the vehicle is driving on a flat road, the vehicle is normal, but when it encounters a pothole, the steering wheel will shake. This is due to the fact that when the car is driving, due to the loose wear of the tie rod ball joint or the rubber sleeve at the joint falls off, and the exposed tire becomes irregular due to wear, it should be sent to a professional maintenance point for inspection and replacement of damaged parts.

Unable to start or difficult to start:

The phenomenon of not starting may be that the ignition switch is turned on and the engine does not have any signs of starting, the starter is loud but cannot rotate, the starter can turn but cannot move the engine, or the engine can be driven by the starter but cannot start. Difficulty in starting may be the slow rotation of the engine, or the rotation of the engine.

These phenomena are related to the main injector, cold start injector, temperature control switch.

The ECU and the control circuit are not working well, the battery is losing power, the igniter or pulse generator is damaged, and the fuel is not supplied with oil or the oil supply is abnormal. In the case of automatic transmission cars, not being able to start may be the transmission.

The handle is not in the right position.