06 elantra 1.6 automatic, now when the speed reaches 100, it accelerates the vibration of the car and feels that the power of the car is insufficient. Please give it to the master.

Symptom 1: Vibration when the car is driving at a high speed: When the car is driving at a high speed or at a certain high speed, there will be instability, head shaking and even steering wheel shaking. The pollution of oil supply system is easy to cause the engine jitter of new car. Maintenance of driving jitter caused by automobile hydraulic torque converter

Reason:

First, the front wheel positioning angle is not accurate, and the toe-in is too large;

Two, the front tire pressure is too high or too low or tire dynamic imbalance and other reasons caused by the repair;

Third, the front wheel hub is deformed or the number of tire bolts is different;

4. Loose installation of transmission system parts;

Five, the transmission shaft bending, dynamic imbalance; Front axle deformation;

Six, shock absorber failure, the stiffness of the front leaf spring is inconsistent; Frame deformation, rivet looseness or front axle deformation.

Diagnosis and elimination:

First of all, there are two kinds of high-speed shimmy. First of all, shimmy becomes stronger with the increase of vehicle speed. Second, when the steering wheel shakes at a certain high speed, first set up the drive axle, insert the safety plug on the front wheel, start the engine, and gradually shift gears, so that the driving wheel can reach the final test shimmy speed. If the body and steering wheel are shaking at this time, it is the vibration caused by the transmission system, because the front axle of the front wheel is at rest at this time; If the final test shimmy speed is reached, the vehicle does not shake, and the shimmy is caused by the failure of the front axle of the vehicle;

Second, check whether the positioning angle and toe-in of the front wheel meet the requirements, and adjust it if it is not aligned;

Third, set up the front axle to try to turn the wheel, check the static balance of the wheel, and check whether the tire is too deformed. If necessary, replace the good wheels for comparison test;

Fourth, check whether the front axle and the frame are deformed, check whether the transmission shaft is bent, and do dynamic balance of the transmission shaft when possible;

5. Check the stiffness of the front leaf spring, the efficiency of the shock absorber and the looseness of the rivet of the spring bracket. If the performance does not meet the requirements, please replace it.

6. Check whether the chassis is loose and whether the ball head is aging.

Symptom 2: Began to tremble:

Solution: Generally, the diaphragm of the pressure plate is soft or uneven, so the clutch pressure plate should be replaced.

Symptom 3: Accelerated shaking or idling shaking during exercise.

Solution: When you exercise, you will shake when you accelerate. Maybe the inner cage is broken. If the idle speed is normal or uneven, the throttle may be dirty and should be cleaned. Be careful not to just wash the throttle, the throttle idle valve must be disassembled and cleaned, and the bearing of the idle valve must be lubricated. Adjust the throttle valve after washing. Generally, the idle bolt can be adjusted to the end, otherwise the idle speed will be high.

Symptom 4: The cab is shaking badly, especially when refueling is slow, and the steering wheel and workbench vibrate together.

Solution: There are three screws loose on the shelf of the rubber pad of Yuanbao beam. Then use one thousand catties to support the engine, the higher the better. Just tighten these three screws and put down 1000 pounds.

Symptom 5: Vehicle shakes during cold start.

The main reason is that the fuel burns badly and the power provided to the vehicle is insufficient.

1. Low ignition energy: During the cold start of the vehicle, if the temperature in the engine is low and the temperature of fuel and lubricating oil is low, more fuel needs to be injected to meet the power requirements. After long-term use, the gap between the two poles of the spark plug is easy to become larger, which leads to the reduction of ignition energy and poor fuel atomization, thus making the vehicle shake. In addition, the aging of ignition coil, aging of spark plug high voltage line or leakage will also lead to the decrease of ignition energy.

2. Inappropriate mixing ratio: In closed-loop controlled vehicles, the minimum working temperature of the oxygen sensor is 370 degrees Celsius. If the temperature in the exhaust pipe does not reach 370 degrees Celsius just after starting the vehicle, the oxygen sensor will not work. At this time, the ECU made a mistake in judgment, and the actuator made a mistake in controlling the fuel-air mixing and ignition time, thus reducing the power output of the vehicle and causing jitter.

3. Carbon deposition on the valve and intake port: If carbon deposition occurs on the valve and intake port in the engine, and the carbon deposition can absorb a proper amount of fuel, then the ECU will make a wrong judgment and fail to meet the required power performance, and jitter is inevitable.

4. The working conditions of each cylinder are different: after long-term use, the ignition gap and time control of spark plugs in each cylinder will be different, but ECU can't diagnose this deviation and still treat it equally, which leads to errors in practice and theory. The power generated by some cylinders is too small, which will lead to jitter.

5. Water temperature sensor failure: The water temperature sensor is one of the important bases for the computer to judge the engine working condition at that time. The failure of water temperature sensor will lead to the deviation of fuel injection quantity controlled by computer, which will lead to vehicle jitter.

According to you, the motivation is insufficient. I think you may have lost the cylinder in the high-speed engine. You can check the oil pump, engine and so on.