What Causes the Abnormal Noise When Shaking the Rear Wheels After Parking?

What is the method to prevent stalling and rolling back on a slope?

Avoiding stalling or rolling back on a slope: 1. Apply throttle when starting on a slope: When going uphill, if you don't apply throttle, it's likely that the idle speed won't be sufficient to move the vehicle, causing it to stall. Once rolling back starts, it's difficult to avoid stalling. If rolling back occurs, you must first press the brake and clutch, stop the car, and then restart. 2. Release the clutch slowly: When starting on a slope, slowly release the clutch pedal with your left foot until the vehicle begins to vibrate. Hold it slightly at this position to confirm if the vehicle has the tendency and power to move forward. Do not continue to lift the clutch pedal to prevent stalling. When the vehicle moves forward, release the handbrake completely with your right hand and gently apply throttle. Don't lift the clutch too high; if it's too high and the handbrake isn't released, the car will stall. Just let the front of the car rise slightly—there's no need to reach the 'perfect contact point.' 3. Avoid prolonged throttle acceleration: During the starting process, avoid prolonged throttle acceleration in a semi-engaged state—as long as the vehicle is driven by the throttle, it won't roll back. Feel free to release the clutch pedal and press the throttle to start.

11

5

Share

What Causes the Abnormal Noise in Dual-Clutch Transmissions?

Abnormal noise primarily stems from the sound generated by the shift fork operation during gear changes in the transmission. To reduce this noise, improvements in the transmission's NVH (Noise, Vibration, and Harshness) performance are necessary, along with coordinated optimization in the vehicle's overall NVH development. Therefore, some level of abnormal noise is inherent in transmissions. Additional relevant information is as follows: 1. Note: Currently, the jerking issue in dual-clutch transmissions cannot be entirely avoided, but it can be largely mitigated through proper driving techniques, such as smoother throttle control with the right foot and mutual adaptation between the driver and the vehicle. 2. Advantages: Dual-clutch transmissions offer lower fuel consumption compared to traditional transmissions and provide nearly seamless gear shifts, giving them a significant edge over both automatic and manual transmissions.

8

5

Share

What is the height of a four-axle vehicle in meters?

The length of a sedan is approximately 4.8 meters, and the width is around 1.8 meters. Different models of sedans may vary in size. Length: Micro cars range from 3 to 4 meters, while small cars are about 4 meters long. The width generally falls between 1.4 and 1.8 meters. Width primarily affects seating space and flexibility. Main advantages: Internationally recognized standards classify cars into A0, A, B, C, D, and E segments based on size. The dimensions for A0, A, B, C, D, and E segment cars are as follows: 1. A0: 3.5-4.0 meters, e.g., Polo. 2. A: 4.0-4.5 meters, e.g., Jetta, Sagitar, Corolla.

20

1

Share

What Causes High Fuel Consumption in the Teana?

The reasons for high fuel consumption in the Teana include abnormal tire pressure or switching to larger-sized tires; prolonged idling without turning off the engine or frequent ignition; aggressive acceleration and frequent braking while driving; driving at high speeds in low gear or low speeds in high gear; fully open windows in summer and using air conditioning during traffic jams; poor route planning, driving on congested roads, and frequent lane changes. The Teana's combined fuel consumption ranges from 5.9-6.7L/100km. Currently, there are 6 models of the Teana available for sale. The combined fuel consumption for the Fashion Edition, Intelligent Navigation Edition, and Comfort Edition is 5.9L/100km. The Intelligent Navigation Edition and Intelligent Edition have a combined fuel consumption of 6.6L/100km. The Intelligent Premium Navigation Edition has a combined fuel consumption of 6.7L/100km. The above figures are based on the NEDC combined fuel consumption, which is measured under the NEDC test procedure. Real-world fuel consumption is higher than these values, ranging from 7.0-9.0L/100km. Here are 5 tips to help reduce fuel consumption while driving: When starting the vehicle, use a low gear, gently press the accelerator, and gradually increase speed. Avoid sudden, aggressive acceleration, as this can multiply fuel consumption. Gentle acceleration and braking, and early braking: While driving, lightly press the accelerator to avoid sudden increases in engine RPM and prevent the car from shaking, which improves fuel efficiency. By anticipating road conditions and applying slow, even acceleration or braking, fuel economy can improve by up to 20%. Maintain proper tire pressure: Keep tire pressure at the manufacturer-recommended level. For every 2 PSI below the recommended value (equivalent to about 0.2 in metric units relative to the standard pressure of 2.4), fuel consumption increases by 1%. Regular vehicle maintenance or inspections: Regular oil changes can reduce carbon buildup (carbon deposits can cause ignition issues, sluggish acceleration, increased fuel consumption, and in severe cases, even engine misfires). Regularly check and replace dirty air filters, clean or replace fuel injectors, spark plugs, and throttle bodies as per mileage recommendations. Keep windows closed while driving. Open windows increase wind resistance, which in turn increases the resistance the car faces, requiring more power and thus increasing fuel consumption.

3

0

Share

Is the First Inspection for a New Car Necessary?

New car first inspection is not necessary. The first inspection of a car is usually done after three months. The first inspection is also known as the first maintenance. The first maintenance items include: 1. Replace the engine oil and oil filter, check the working condition of the braking system, such as the gap and wear of the brake pads and brake discs, tighten the bolts of each system, check and adjust the transmission belt, check and adjust the tire balance and alignment; 2. Check and replenish various oils, check the working condition of components such as lights, battery, shock absorbers, etc. After completing the first maintenance, it indicates that the running-in period of the vehicle has ended, and the vehicle can be driven according to the standard load and normal speed specified by the vehicle.

16

1

Share

How many kilometers should a private car change its oil?

Generally, mineral oil must be changed every 5,000 kilometers, while fully synthetic oil can last up to 10,000 kilometers before needing a change. This refers to the type of oil. Another factor is usage time; typically, oil should be changed every six months. If the car is driven less frequently, the oil change interval can be extended slightly. The functions of engine oil are as follows: 1. Lubrication: The primary role of engine oil is to lubricate the engine's pistons, bearings, and other components, providing protection. 2. Sealing: After the engine is coated with oil, it helps seal during the "power stroke," preventing high-temperature, high-pressure gases in the combustion chamber from leaking into the crankcase through gaps. 3. Heat dissipation: When the engine operates at high speeds, various components generate heat due to friction. This heat is carried away by the circulating oil to the oil cooler and dissipated into the air. 4. Rust prevention: Besides lubrication, engine oil effectively prevents metal parts from rusting and corroding. 5. Cleaning: Impurities and metal wear particles produced during engine operation are filtered out by the oil filter, keeping the lubrication system clean.

13

1

Share

What Causes the Abnormal Noise When Shaking the Rear Wheels After Parking?

What is the method to prevent stalling and rolling back on a slope?

What Causes the Abnormal Noise in Dual-Clutch Transmissions?

What is the height of a four-axle vehicle in meters?

What Causes High Fuel Consumption in the Teana?

Is the First Inspection for a New Car Necessary?

How many kilometers should a private car change its oil?

What Causes the Window Regulator to Fail Moving Up and Down?

What is the difference between blue, red, and green antifreeze?

What grade of gasoline should the Volkswagen Talagon use?

What is the purpose of the handbrake?