Why do the taillights remain on after the engine is turned off?

What does Subject 3 test include?

Subject 3, which includes the road driving skills test and the safety and civilized driving knowledge test, is part of the motor vehicle driver's license assessment. It is the abbreviated term for the road driving skills and safety and civilized driving knowledge test subjects in the motor vehicle driver's examination. The specific details are as follows: 1. Road test content: The road driving skills test of Subject 3 generally includes: vehicle preparation, light simulation test, starting, driving straight, gear shifting operations, lane changing, pulling over, going straight through intersections, turning left at intersections, turning right at intersections, passing pedestrian crossings, passing school zones, passing bus stops, meeting vehicles, overtaking, making U-turns, and nighttime driving. 2. Theoretical content: The safety and civilized driving knowledge test of Subject 3 generally includes: safety and civilized driving operation requirements, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-accident handling knowledge.

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What Are the Common Issues After Cleaning Fuel Injectors?

Common issues after cleaning fuel injectors include increased fuel consumption and higher idle speed. The working principle of fuel injector spraying is as follows: high-pressure fuel is pumped into the fuel injector supply port, creating high pressure inside the injector body that acts on the conical surface of the injector nozzle. When the fuel pressure exceeds the set value, the injector valve core opens, and high-pressure fuel is sprayed from the nozzle holes in a mist form into the engine cylinder for combustion, driving the piston's reciprocating motion. Common fuel injector faults and their solutions are: 1. Clogged nozzle holes: Use chromium oxide applied to a flat plate for grinding; if the cylindrical surface of the needle valve is significantly worn, it should be replaced promptly. 2. Poor sealing: Apply chromium oxide or toothpaste to the sealing band at the needle valve end. 3. Piston wear: Replace the piston.

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What is the sign for a high-occupancy vehicle lane?

High-occupancy vehicle lane sign color: Typically white on a blue background. The high-occupancy vehicle lane sign indicates that the lane is only for vehicles with multiple occupants. The high-occupancy vehicle lane sign complies with Articles 38, 68, 6, and 3 of the Road Traffic Law of the People's Republic of China, which stipulate legal consequences for traffic violations related to directional signs, directional markings, prohibitory signs, warning signs, and other road traffic violations indicated by such signs. Precautions for driving on highways are as follows: 1. Safety check: Check for potential safety hazards before getting in the car. Before driving on the highway, you should inspect your vehicle for any safety risks. 2. Wear seat belts: Always wear seat belts on the highway, including the driver, front passenger, and rear seats. Avoid placing loose items in the car.

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How Many Kilometers Can You Drive After the Fuel Tank is Empty?

Generally, you can drive 30-50 kilometers after the fuel gauge shows empty. The fuel pump is located inside the fuel tank and generates a significant amount of heat during operation. The fuel itself acts as its coolant, continuously cooling the pump to ensure proper functioning. Without the cooling effect of fuel, the lifespan of the fuel pump can be significantly shortened. Insufficient fuel can also damage the engine. Symptoms of a faulty fuel level sensor (fuel float) include: 1. The fuel gauge needle being stuck at a certain position; 2. The fuel gauge suddenly dropping to zero. The fuel float is a sensing device for fuel level, usually made of foam plastic, and together with the fuel gauge, it forms the vehicle's fuel level detection system. When the fuel level in the tank decreases, the fuel float sinks, moving the sliding arm and increasing resistance, which in turn reduces the current returning to the fuel gauge.

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Is It Normal to See Black Smoke When Accelerating Hard?

This is not a normal phenomenon. If black smoke appears when the engine is cold, check for any damage or air leaks in the air intake system, then inspect the fuel injectors for dripping and ensure the seals are intact. If black smoke persists after the engine warms up, examine the fuel injection volume, injection pressure, and the data or waveform from the front oxygen sensor to determine if its correction function is working properly. Also, check the condition of the catalytic converter and the coolant sensor. Methods to address black smoke when accelerating hard: 1. Overly rich air-fuel mixture: Inspect whether the oxygen sensor has failed. If the oxygen sensor fails, the vehicle loses its ability to automatically adjust the fuel injection volume, making black smoke more likely when accelerating hard. 2. Excessive fuel impurities: If low-quality fuel is used, it can produce many impurities after combustion. 3. Degraded or failed spark plugs: Spark plugs are responsible for igniting the air-fuel mixture. If they are worn out, they may fail to effectively ignite the gasoline, leading to incomplete combustion. In such cases, replacing the spark plugs is the only solution.

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What are the license plate registration requirements for new energy vehicles in Shenzhen?

Shenzhen new energy vehicle license plate registration requirements: 1. Local residents only need a driver's license, while non-Shenzhen residents require a residence permit + uninterrupted Shenzhen social security for 2 consecutive years + driver's license. 2. The applicant must not have a Guangdong B license plate car in their name or any vehicle that should be scrapped but has not completed the deregistration process. 3. The applicant must not have a valid quota or be eligible to apply for a renewal quota, meaning the individual must not have any Shenzhen-licensed cars in their name. Relevant information about license plates: 1. Introduction: License plates, commonly known as vehicle plates, refer to the plates hung on the front and rear of vehicles, displaying the vehicle's registration number, registration region, or other relevant information. 2. Function: License plates serve as identification and information registration for vehicles, primarily allowing identification of the vehicle's region of registration and enabling the tracing of the vehicle's owner and registration details through the plate number.

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Why do the taillights remain on after the engine is turned off?

What does Subject 3 test include?

What Are the Common Issues After Cleaning Fuel Injectors?

What is the sign for a high-occupancy vehicle lane?

How Many Kilometers Can You Drive After the Fuel Tank is Empty?

Is It Normal to See Black Smoke When Accelerating Hard?

What are the license plate registration requirements for new energy vehicles in Shenzhen?

What does oil grade mean?

Which is the external circulation in car AM?

What is the maintenance interval for SAIC Volkswagen vehicles?

How to Repair Minor Car Scratches?