What should be paid attention to in parallel parking for Subject 2?

How many points are deducted for improper seat belt usage?

Improper seat belt usage does not result in point deductions; only failure to wear a seat belt will lead to point deductions. Correct method of wearing a seat belt: The primary function of a seat belt is to cushion the forward or backward inertia of the driver and passengers during an accident, keeping them as securely fixed to the seat as possible. When wearing a seat belt correctly, the shoulder strap should cross the chest, and the lap belt should fit snugly against the hip bones. This is mainly to ensure that the impact force during an accident is absorbed by the human skeletal structure rather than the softer internal organs. Failure to wear a seat belt: When driving on urban expressways or highways, if the driver fails to use the seat belt as required, they will be fined and have 2 points deducted from their license.

6

4

Share

Will the engine noise decrease after the break-in period for a new car?

After the break-in period, the engine noise of a new car will decrease slightly because the car's components will reach their optimal combined state. Avoid prolonged high-speed driving during the break-in period: During the break-in period of a new car, avoid prolonged high-speed driving. High-speed driving causes the engine to operate at high RPMs, which can easily lead to engine overheating and exacerbate abnormal wear. Excessive engine noise during the break-in period: Since the engine is not fully broken in during this period, there may be some noise. If the noise is particularly loud, it is recommended to visit a 4S shop for inspection to ensure the car operates normally during the break-in period. Abnormal engine operation during this period can lead to excessive wear, thereby reducing the engine's lifespan.

3

2

Share

What is the difference between having a 't' and not having a 't'?

The difference between having a 't' and not having a 't' lies in the engine type and power output. Different engines: Cars with a 't' are equipped with turbocharged or supercharged engines; cars without a 't' are equipped with naturally aspirated engines. Different power outputs: With the same displacement, cars with a 't' have stronger power output than those without a 't'. However, maintenance and repair costs for cars with a 't' are much higher than those without a 't'. For long-distance driving, cars with a 't' are more fuel-efficient because the turbocharger kicks in, allowing for more complete fuel combustion. In urban driving, cars without a 't' are more fuel-efficient because it's difficult for vehicles to reach speeds where the turbocharger can engage in city traffic.

4

2

Share

Steering Wheel Vibration at Speeds Above 80 km/h

This situation occurs due to poor gasoline combustion and excessive dirt on the throttle body, which causes engine vibration that is transmitted to the steering wheel. Solution: Visit a repair shop to check if the throttle body is excessively dirty. If necessary, clean and inspect the bottom-related automotive components. Perform wheel dynamic balancing again. The only solution when the steering wheel vibrates slightly when braking at speeds above 80 km/h: Perform wheel dynamic balancing again. The dynamic balance of wheels and tires is extremely delicate yet crucial. If any issues are detected, the following checks must be performed: First, inspect the balance weights on the wheels. If the balance weights are missing or have fallen off, it will mostly cause steering wheel vibration. After installing new balance weights, ensure that both longitudinal and lateral vibration amplitudes are less than 0.3 mm. Additionally, since the front wheels are steering wheels, the requirements for wheel dynamic balance are extremely stringent.

5

Share

Can Reducing the Size of Fuel Injectors Save Fuel?

Reducing the size of fuel injectors can save fuel. Fuel Injectors: Fuel injectors spray fuel into the engine cylinders, atomizing it for combustion. The combustion efficiency of the engine depends on the degree of fuel atomization, which in turn is determined by the number of holes in the fuel injectors. Better atomization leads to improved power, more aggressive acceleration, more stable engine operation, reduced vibrations and noise, smoother gear shifting, more consistent acceleration, and better throttle response. Symptoms of Clogged Fuel Injectors: Engine vibrations, unstable idle, lack of power, weakened performance (e.g., unresponsive throttle, uneven acceleration), increased engine noise, and a slight misfire feeling when upshifting at low RPMs. Common causes of clogged fuel injectors include carbon deposits in the engine accumulating on the injectors or impurities in the gasoline blocking the injector pathways. Gasoline naturally contains gums and impurities.

6

4

Share

What Causes a Truck Engine to Lack Power?

Engine power loss may be caused by issues in the fuel system, intake system, or electrical system. Fuel System: This feeling of powerlessness in the vehicle is primarily due to the engine suddenly not receiving sufficient fuel. Insufficient fuel entering the combustion chamber could result from clogged fuel injectors, fuel line leaks, reduced fuel pump performance, or a blocked fuel filter. Intake System: Common intake problems often occur in components like the air filter or throttle system blockages. Malfunctions in these small parts can lead to inadequate air intake. Electrical System: The electrical system mainly refers to the power supply for the ignition system. The electrical system generates high-voltage electricity, which is supplied to the spark plugs via wires, and the spark plugs ignite the air-fuel mixture in the combustion chamber. Therefore, issues with wires or spark plugs are most likely to cause insufficient power.

13

1

Share

What should be paid attention to in parallel parking for Subject 2?

How many points are deducted for improper seat belt usage?

Will the engine noise decrease after the break-in period for a new car?

What is the difference between having a 't' and not having a 't'?

Steering Wheel Vibration at Speeds Above 80 km/h

Can Reducing the Size of Fuel Injectors Save Fuel?

What Causes a Truck Engine to Lack Power?

Can a China V vehicle be transferred to Jiangsu?

Is One Barrel of Engine Oil Enough for an Oil Change?

Will the engine malfunction light affect vehicle inspection?

What Causes Engine Paint to Peel?