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What are the reasons for the ineffective brakes of the Haval H3?

2 Answers

TeaganFitz

07/29/25 11:31am

Common reasons for the ineffective brakes of the Haval H3 mainly include water ingress in the brake fluid, leaks in the brake system, damage to the booster, etc. Excessive moisture or air in the brake fluid: This causes air resistance in the brake fluid, leading to insufficient force in the calipers during braking and ultimately resulting in brake failure. Leakage in the brake system: Due to aging or other reasons, the main components or pipelines of the brake system may develop leaks in the brake fluid. Damage to the booster: If the brake booster is damaged or there is a vacuum issue, it cannot provide the necessary assistance. Poor braking performance of the brake discs and pads: If you experience ineffective brakes during daily driving, it is essential to immediately drive to a repair facility for inspection and maintenance.

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McMadelyn

08/13/25 7:24pm

Driving SUVs like the Haval H3 for a long time, brake failure is really a big issue. I often drive on mountain roads and feel abnormal brake softness or hardness. The most common problem is that the brake pads wear too thin. You need to check them every 20,000 to 30,000 kilometers—if the thickness is below 3mm, it’s dangerous. It could also be due to low fluid level or contaminated/water-mixed brake fluid in the reservoir, leading to insufficient hydraulic pressure and a weak pedal feel. Fluid leaks in the lines or ABS sensor malfunctions can also cause trouble. Last year, my car had this issue, and the mechanic said the H3 model’s braking system ages faster. If you notice any abnormalities, don’t push it—pull over, turn on the hazard lights, and get it inspected and serviced at a professional shop to avoid accidents. Regularly replacing the fluid and pads is key to prevention—safety first, after all.

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What Causes a Car to Emit Black Smoke While Driving?

Car emitting black smoke while driving is caused by: 1. Use of low-quality fuel; 2. Clogged air filter, resulting in an overly rich air-fuel mixture and insufficient oxygen supply to the engine, leading to incomplete combustion; 3. Spark plug leakage, weak high voltage, or poor sparking; 4. Poor driving habits during acceleration, insufficient cylinder pressure, or excessively low engine temperature. Solutions for a car emitting black smoke while driving include: 1. Repair or replace relevant components such as the air filter, fuel injector, valve seals, cylinder and piston assembly, and oxygen sensor; 2. Clean relevant components to prevent clogging, such as the air filter and fuel injector; 3. Change driving habits, as frequently flooring the accelerator will worsen and increase the occurrence of issues like black smoke emission.

What is the reason for the failure to switch between high and low speeds?

Possible reasons include staying in neutral for too short a time, which is the most common cause; another possibility is gear clash in the auxiliary box. Here are some additional details: 1. Inspection: If there is no high-gear start and the operation is correct, then thoroughly inspect the air pressure, air pipe, pre-selector valve, shift cylinder, auxiliary box shift fork, auxiliary box synchronizer, and auxiliary box drive gear. If no other issues are found, these can be disregarded. First, consider the shift cylinder and fuel tank synchronizer. 2. Precautions: It is recommended to switch between high and low gears only between 4th and 5th gears. Skipping gears when switching can cause severe wear on the auxiliary box synchronizer, leading to malfunctions. When parking, only park the vehicle in neutral in the low-gear range, meaning the shift lever's side knob should face downward. It is strictly prohibited to park and shut off the engine in neutral in the high-gear range, as this may cause serious malfunctions.

Is there a possibility of reversing on the highway without being caught by cameras?

It is almost impossible. According to the relevant provisions of the Road Traffic Safety Law, reversing or driving in the opposite direction on the highway not only results in a fine but also leads to a full deduction of 12 points in one instance. Below is some information about the driving test: 1. Subject 1: Road traffic safety laws, regulations, and related knowledge test. It is a written test conducted on a computer, with a full score of 100, and a passing score of 90 or above (including 90). 2. Subject 2: Field driving skills test. It is a practical test conducted in a designated area, with only pass or fail results. It includes reversing into a garage, parallel parking, S-curve driving, right-angle turning, and starting and stopping on a slope. These five items are mandatory and conducted in sequence, with a full score of 100, and a passing score of 80 or above (including 80). 3. Subject 3: Road driving skills test. It is a practical test conducted on a road or simulated area, with a full score of 100. The passing scores are 90 or above for large buses, 80 or above for large trucks, and 70 or above for other vehicle types. 4. Subject 4: Safety and civilized driving-related knowledge. It is a written test with a full score of 100, and a passing score of 90 or above (including 90).

Is a 1.5L Car Engine Sufficient?

A 1.5L car engine is sufficient as long as the vehicle is not fully loaded. Climbing hills and overtaking can be quite effortless. However, if the driver frequently travels on highways or drives on mountainous roads, it is advisable to opt for a vehicle with a larger displacement. The 1.5L designation refers to a naturally aspirated engine with a displacement of 1.5 liters. The working principle of a naturally aspirated engine is that it lacks a supercharger; air simply passes through the air filter, throttle, intake manifold, and reaches the cylinders. Gasoline is directly injected into the intake manifold via the fuel injector. The engine consists of: 1. Valve train; 2. Crankshaft and connecting rod mechanism; 3. Ignition system; 4. Cooling system; 5. Lubrication system; 6. Starting system; 7. Fuel supply system.

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Engine knocking occurs due to the following reasons: 1. Carbon deposits in the combustion chamber; 2. Low octane rating of the fuel; 3. Incorrect ignition timing; 4. Overheating of the engine; 5. Incorrect air-fuel ratio. Solutions to engine knocking include: 1. Delaying the ignition timing; 2. Cleaning the fuel system and injectors; 3. Using qualified fuel additives; 4. Choosing fuel suitable for the engine's compression ratio; 5. Repairing or replacing the water pump. Engines are categorized by their working principles into piston engines, ramjet engines, rocket engines, and turbine engines. Their function is to convert thermal energy into mechanical energy by burning fuel in a sealed cylinder, causing the gas to expand and push the piston, thereby providing power to the vehicle.

Should the Car Air Conditioner Use Internal or External Circulation?

Whether to use internal or external circulation in a car's air conditioning depends on the situation: use internal circulation for short trips and external circulation for long trips. Internal and external circulation in cars refer to: 1. Internal circulation means the air conditioning system is closed to outside air and only recirculates the air inside the car; 2. External circulation means the car's air conditioning system is open to outside air, drawing in and circulating air from outside the car. The functions of a car's air conditioning are: 1. To cool, heat, ventilate, and purify the air inside the car; 2. To provide a comfortable environment for passengers, reduce driver fatigue, and improve driving safety.

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