Why Don't They Check Driver's Licenses During Drunk Driving Inspections?

What Causes a Car to Not Start After Refueling?

The fuel pump fails to cool, leading to fuel pump ablation. Below are related explanations for why a car may not start after refueling: 1. Incorrect Gear Position: When starting an automatic transmission car, the gear must be in P (Park) or N (Neutral). If it's in R (Reverse) or D (Drive), the car won't start, posing potential safety hazards. If the car wasn't left in P when parked, the driver might overlook this issue upon returning. Most modern vehicles display a reminder on the dashboard, and some may also have a buzzer, making this scenario rare. 2. Steering Wheel Lock: If the steering wheel isn't straightened when parked and is at a significant angle (e.g., over 30 degrees), the steering wheel may automatically lock as an anti-theft feature. This can make the key difficult to turn, preventing ignition. 3. Clogged Fuel Filter: A partially or fully clogged fuel filter can restrict fuel supply, impede fuel return, and increase fuel system pressure, resulting in an overly rich air-fuel mixture. This condition may cause the car to fail to start or exhibit jerking movements while driving.

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How many points are deducted for speed and gear mismatch during gear shifting?

In the third subject of the driving test, a mismatch between speed and gear directly results in a deduction of 10 points. Below are the relevant details about the gear shifting project in Subject 3: 1. Downshifting operation: When the speed slows down, you can shift to fourth gear when it drops below 50 mph, to third gear when it drops below 40 mph, to second gear when it drops below 30 mph, and to first gear when it drops below 20 mph; 2. Upshifting must be done one gear at a time, and downshifting must also follow the instructions. Since the vehicle speedometer may show a slight difference from the actual speed, candidates should perform the gear shift when the speed is slightly higher or lower than indicated on the speedometer; 3. The gear shifting project has specific time requirements. Shifting gears too slowly or depressing the clutch for too long will generally result in failure. During the practice session at the test site, candidates should memorize the gear shifting process. During the actual test, when the test vehicle enters the gear shifting project, candidates can adjust the vehicle speed in advance to approach the shifting speed. When the voice prompt is given, they can quickly perform the gear shift.

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What Causes the Feeling of Jerking Acceleration as if Not Supplying Fuel?

There can be many reasons for this situation. First, it could be an issue with fuel quality. Additionally, it is necessary to check the vehicle's intake system, fuel system, spark plugs, and ignition coils. Some vehicles may experience jerking sensations due to carbon buildup. Below are some related reasons for the feeling of jerking acceleration as if not supplying fuel: 1. Carbon buildup in the engine and intake manifold: Carbon deposits can absorb a certain amount of fuel, causing the ECU to make incorrect judgments. For example, if the computer controls the injection of 100 units of fuel-air mixture, but only 90 units actually enter the cylinder because 10 units are absorbed by carbon deposits, even if the remaining 90 units burn completely, the required power output is not achieved, leading to unavoidable jerking. 2. Ignition system failure: Aging of the ignition system can weaken the ignition energy, causing the ignition coils or spark plugs to fail to ignite continuously or to experience interruptions during ignition. Intermittent ignition results in uneven power output, leading to jerking sensations during acceleration. Therefore, it is important to focus on the maintenance and replacement of the ignition system during daily vehicle use. If a spark plug fails while driving, it can easily cause an engine misfire, severely affecting the engine's lifespan.

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What is the difference between 9AT and 6AT?

The difference between 9AT and 6AT is: the 9AT transmission has more gears, and its transmission efficiency is higher than that of the 6AT transmission, while also offering better fuel economy. More details are as follows: 1. The AT transmission is the most mature and widely used transmission, providing smoother gear shifts and better reliability and stability. 2. The AT transmission relies on planetary gears for speed and torque changes, and it contains many planetary gears inside. There are three common types of automatic transmissions: AT transmission, CVT transmission, and dual-clutch transmission. 3. The dual-clutch transmission is currently a popular transmission type, known for its high transmission efficiency and fast gear shifts. Its structure is similar to that of a manual transmission, with the addition of a gear-shift control mechanism and an extra clutch. One clutch controls the odd-numbered gears, while the other controls the even-numbered gears. 4. The CVT transmission has a different structure compared to conventional transmissions. It consists of two cone pulleys and a steel belt, providing smooth gear shifts and good reliability and stability. The CVT transmission allows the engine to maintain an optimal RPM range, thereby improving the vehicle's fuel efficiency.

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Why Do You Need to Get Out of the Car When Refueling with Gas?

Reasons why all occupants must exit the vehicle during gas refueling: During refueling, the gas cylinder filling pressure undergoes a process from low to high, which poses potential hazards such as explosions or leaks. If occupants unconsciously use open flames or mobile phones, any natural gas leakage could trigger an accident. To prevent such incidents, all personnel must exit the vehicle during refueling. The natural gas used in vehicles is a high-pressure filled liquid gas. Since the human body carries static electricity, friction between clothing and seat covers can generate even more static electricity. In the event of a gas leak, the presence of open flames or static electricity while occupants remain in the vehicle would endanger everyone onboard. Additional precautions during gas refueling: Stand in the safety zone: Potential hazards like refueling gun explosions or disconnections may occur due to pressure issues or seal ring damage, so drivers and passengers must move to the safety zone. Open the trunk to inspect the gas cylinder for any safety risks. Turn off all electrical devices and the engine: This prevents sparks from static electricity or short circuits in the vehicle's electrical system that could cause explosions. Avoid placing flammable or explosive items on the dashboard. Always carry a small vehicle-mounted fire extinguisher in the car.

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Should I Purchase Comprehensive Insurance for a New Car?

Whether to buy comprehensive insurance for a new car depends on individual needs. Most car owners generally purchase the following types of commercial insurance: 1. Vehicle Damage Insurance. Vehicle Damage Insurance covers the costs incurred due to vehicle damage caused by traffic accidents during driving. 2. Third-Party Liability Insurance. Third-Party Liability Insurance refers to the economic liability that the insured or their permitted driver should bear according to the law when a traffic accident occurs while using the insured vehicle, resulting in bodily injury, death, or direct property damage to a third party. The insurance company will compensate according to the insurance contract. 3. Passenger Liability Insurance. Passenger Liability Insurance refers to the compensation liability that the insured should bear according to the law when an insured accident occurs while a qualified driver permitted by the insured is using the insured vehicle, resulting in bodily injury or death to passengers in the vehicle. The insurance company will compensate according to the insurance contract. 4. Full Vehicle Theft Insurance. When the insured motor vehicle is stolen, robbed, or snatched, resulting in vehicle loss, or when the vehicle is damaged or parts and accessories are lost and need repair during the theft, robbery, or snatching, the insurance company will compensate according to the contract.

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Why Don't They Check Driver's Licenses During Drunk Driving Inspections?

What Causes a Car to Not Start After Refueling?

How many points are deducted for speed and gear mismatch during gear shifting?

What Causes the Feeling of Jerking Acceleration as if Not Supplying Fuel?

What is the difference between 9AT and 6AT?

Why Do You Need to Get Out of the Car When Refueling with Gas?

Should I Purchase Comprehensive Insurance for a New Car?

What is the difference between natural gas vehicles and gasoline vehicles?

What is the difference between different gasoline grades?

Can You Drive Immediately After Adding Coolant?

What Causes Car Shaking After Adding Fuel Additive?