Why does the 4S shop only replace one shock absorber?

What Causes a Vehicle to Fail Emission Standards?

High sulfur and phosphorus content in gasoline can form chemical complexes on the surface of the oxygen sensor and the three-way catalytic converter; congested urban roads, frequent vehicle starts and stops, and idling lead to incomplete combustion, with byproducts adhering to the surface of the three-way catalytic converter; engine carbon deposits and particulate matter can clog the three-way catalytic converter, which are the primary reasons for a vehicle failing emission standards. Below are solutions to address emission failures: 1. Shift to 4th gear and drive at 5th gear speed with wide-open throttle for several dozen kilometers. Principle: Congested urban roads with frequent stops and starts result in incomplete combustion, producing pollutants that adhere to the three-way catalytic converter. At high RPMs, gasoline combustion emits the lowest levels of pollutants, and high-speed airflow can also flush away deposits on the three-way catalytic converter. 2. Keep the engine warm and idling without shutting it off. Before inspection, rev the engine in neutral for 3-5 minutes. Principle: Testing a cold vehicle is unwise. The reason is simple—the optimal operating temperature for the three-way catalytic converter is between 400 to 800 degrees Celsius, and it takes a long time for a cold engine to reach 400 degrees. Revving the engine for a few minutes before testing can rapidly raise the three-way catalytic converter's temperature above 400 degrees and maintain it for a period. 3. Regularly clean the three-way catalytic converter. Principle: Chinese gasoline has high sulfur and phosphorus content, forming chemical complexes on the oxygen sensor and three-way catalytic converter surfaces. Carbon buildup in the fuel system and intake tract, as well as particulate matter, can contaminate the three-way catalytic converter. This leads to restricted exhaust flow, increased backpressure, higher fuel consumption, reduced power, and diminished or even failed purification function of the three-way catalytic converter. In severe cases, it can clog the converter, potentially causing vehicle self-ignition.

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Where Should the ETC Device Be Installed?

For small cars, the ETC device is generally installed in the upper middle part of the windshield, while for large vehicles like trucks and buses, it is installed in the lower middle part. The appropriate installation position should be no lower than 1.2 meters and no higher than 2.5 meters, with an installation angle between 30 to 90 degrees. If the vehicle has a sunshade film or if one is applied later, it may affect the signal transmission of the microwave communication link, so the device should be installed in the microwave window area. ETC stands for Electronic Toll Collection. To apply for an ETC device, you need to provide the original and photocopies of the vehicle owner's valid ID and vehicle registration certificate. If the application is made by someone other than the owner, the agent's valid ID must also be provided. The photocopy of the vehicle registration certificate should include the page with the most recent annual inspection stamp. Additionally, a bank card for deducting highway toll fees is required, and the vehicle must be registered under the name of an individual aged between 18 and 60. Here are some important considerations for installing an ETC device: 1. Do not obstruct the driver's view; it is best to install it behind the rearview mirror: Many car models have windshields with a significant rearward tilt, which can reduce the driver's field of vision. Installing the ETC device without considering this may increase blind spots. Installing it behind the rearview mirror on the right side helps avoid obstructing the view. 2. Ensure it does not interfere with charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement because it has a solar panel on the back for self-charging. Therefore, avoid installing it on the blackened areas of the windshield or in positions that may block the solar panel. 3. Do not remove the device once installed: The adhesive in the middle of the device has an anti-tamper rod connected to a switch. Once installed, the windshield presses the rod in. If the device is removed, the rod pops out, triggering the switch and locking the electronic tag, rendering it unusable. In such cases, you will need to visit an ETC service point to unlock it. This feature is designed to prevent multiple vehicles from sharing the same device. When using ETC, note the following: The ETC transaction sensing range is 8 meters. To avoid paying for the vehicle in front due to a malfunctioning ETC device, maintain a distance of at least 10 meters from the vehicle ahead. The ETC lane recognizes vehicles at a speed of 20 km/h; driving too fast may result in failed fee deductions. If using a debit card linked to ETC, insufficient balance may also cause deduction failures.

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What Details Should Be Paid Attention to When Reversing into a Parking Space?

Pay attention to the following 7 details when reversing into a parking space: 1. Learn to adjust the seat: Since people vary in height and weight, the position of the seat when driving can differ greatly. If not adjusted properly, it will affect the accuracy of reference points. Seat adjustment method: After getting into the car, lightly hold the steering wheel with both hands, and the left foot should be able to easily press the clutch pedal all the way down without feeling strained. Both hands should be able to turn the steering wheel comfortably. After adjustment, use a fist to check the distance between the abdomen and the steering wheel—generally two fists for thin people and one fist for heavier individuals. Remember this distance so that the seat can be adjusted accordingly each time you get in the car. 2. Learn to adjust the rearview mirrors: Most instructors teach reversing into a parking space primarily based on reference points in the rearview mirrors, highlighting their importance. Lower the mirrors to observe the ground markings more easily. You must learn the adjustment method because, during training and exams, students' heights vary, and flexible mirror adjustments are necessary for better observation. 3. Learn to use the rearview mirrors: Beginners often struggle with using the rearview mirrors while in the car. This improves with regular practice. It's best to observe the mirrors while the car is stationary, checking the distance between the car body and the markings and whether they are parallel. Practice this several times. 4. Control the speed: Learn to use the clutch pedal to control the speed. If the car is moving too fast, press the clutch pedal to slow down; if it's about to stop, release the pedal slightly. Repeated practice will help you realize that the speed can be entirely controlled by the clutch pedal. The ideal clutch control results in very slow movement without stopping. 5. Adjust the distance between the car body and the sideline: Before entering the parking space, the distance between the car body and the roadside line should ideally be 1.5 to 2 meters. If the distance is too small, turning the steering wheel fully when entering may cause the front of the car to cross the line. If the distance is too large, it may become difficult to enter the space or even impossible. 6. Correct the direction after entering: Often, the car body is not parallel to the parking lines after entering, meaning it's tilted. This requires direction correction, but beginners tend to overcorrect. 7. Avoid disengaging reverse gear while reversing: Reversing into a parking space requires continuous movement without stopping. If reverse gear is disengaged, the car may stop, leading to disqualification. This issue arises for two reasons: First, reverse gear may not be properly engaged—apply more force during practice and ensure accurate positioning. Second, when starting after stopping during the operation, releasing the clutch pedal too quickly or abruptly can cause reverse gear to disengage. If the clutch is released too abruptly, the meshing gears in the transmission may separate due to excessive force, resulting in loss of reverse power and stopping the car. However, stopping midway is not allowed during the test.

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How to Adjust the Interface on BMW Display Screen?

BMW ConnectedDrive needs to be activated. Log in to the official BMW website and make modifications in the "My BMW" section.

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How to Activate a Mercedes-Benz Spare Key?

Simply insert the key to unlock the door. Locate the key induction area reserved in the car, place the key flat on it, and you can start the car with one button.

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How to Use Sinopec Car Wash Coupons?

Log in to the website and register an account. Select the mall coupon inquiry to view the relevant car wash coupons, then click to use them.

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Why does the 4S shop only replace one shock absorber?

What Causes a Vehicle to Fail Emission Standards?

Where Should the ETC Device Be Installed?

What Details Should Be Paid Attention to When Reversing into a Parking Space?

How to Adjust the Interface on BMW Display Screen?

How to Activate a Mercedes-Benz Spare Key?

How to Use Sinopec Car Wash Coupons?

Where is the cabin air filter of the Great Wall VV7?

How Many Chances Are There for Subject 2 of the Driving Test?

Can ETC be installed by oneself?

Do all new car tires have tire hairs?