What are the conditions for returning or exchanging a car under the Three Guarantees Law?

Is it necessary to replace a damaged underbody felt panel?

Yes, it is necessary. Below is relevant information about the underbody: 1. Introduction: The underbody refers to the combination of the transmission system, running gear, steering system, and braking system in a vehicle. It supports and mounts the engine and its various components and assemblies, forming the overall shape of the vehicle, bearing the engine's power, and ensuring normal operation. 2. Expansion: The running gear consists of parts such as the frame, axle, suspension, and wheels. Its basic function is to support the vehicle's weight and ensure its movement. The steering system is composed of the steering wheel, steering gear, steering knuckle, steering knuckle arm, tie rod, and drag link, among others, and its role is to steer the vehicle.

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Does White or Black Make a Car Look Bigger?

White cars tend to appear larger. The reason lies in the refraction of light. Here are some driving tips: 1. Cold engine warm-up: Proper warm-up helps form an "oil film" between engine components, reducing wear. 2. Timely gear shifting: During the break-in period for manual transmission vehicles, shift gears promptly and appropriately, avoiding incorrect behaviors like high gear with low RPM or low gear with high RPM, and don't use a single gear for extended periods. 3. Timely maintenance: Simply follow the manufacturer's recommendations in the vehicle manual to perform inspections and maintenance at certain mileage or time intervals, including oil and oil filter changes, along with a comprehensive chassis system check. 4. Avoid emergency braking: Emergency braking not only shocks the breaking-in brake system but also increases impact loads on the vehicle's chassis and engine.

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What Are the Causes of Insufficient Car Power?

The causes of insufficient car power include substandard gasoline quality or clogged fuel system, excessively rich combustible mixture, engine overheating, etc. Substandard gasoline quality or the use of incompatible fuel grades can lead to a decrease in the car's output power. Blockages in the fuel tank vent, fuel tank switch, fuel filter, or the fuel line between the tank and the carburetor can restrict the required fuel supply, resulting in insufficient power during engine operation. Owners should use the appropriate fuel grade for their engine as specified, perform regular maintenance, and clean the engine's fuel system as needed. Air is one of the power sources for the engine. If the air filter is not cleaned in time after prolonged use and becomes clogged, insufficient air supply can cause an excessively rich combustible mixture, reducing engine power. Owners should regularly clean the air filter and replace it at the recommended maintenance intervals at a 4S shop to avoid an overly rich combustible mixture. Insufficient engine oil, low engine coolant levels, or malfunctioning engine cooling systems can increase the engine's load, leading to poor heat dissipation. Engine overheating can result in inadequate lubrication, increased mechanical wear, reduced engine power, and higher fuel consumption. Owners should regularly check the levels of engine oil and coolant, avoid mixing different types of engine oil, and refrain from using water as a substitute for coolant. Regular maintenance is essential to prevent engine overheating.

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What is the EPC Warning Light?

The main reasons for the EPC indicator light staying on include engine intake system failure, throttle valve failure, fuel system failure, engine failure, ECU control unit failure, and brake light failure. The EPC indicator light can illuminate in two states: during the power-on self-test and under other circumstances. The power-on self-test is an indication that the vehicle monitors the status of all sensors before driving. Generally, if the vehicle is not started after power-on, the light will turn off by itself after about 3 seconds. The following are detailed explanations of other situations that cause the EPC light to illuminate: Engine intake system failure: When the engine intake is not smooth or the intake volume is insufficient, the EPC light will prompt. Solution: Troubleshoot the intake system failure. Throttle valve failure: Carbon buildup is a common issue with the throttle valve. Additionally, dirt on the main body can also affect intake, causing the indicator light to illuminate. Solution: Clean the throttle valve. Fuel system failure: Examples include substandard fuel, deteriorated fuel, or poor fuel atomization. Solution: Use fuel with the appropriate grade. Engine failure: Insufficient engine pressure or problems with the power system, such as the intake valve, can also trigger the EPC light. Solution: Inspect the engine. ECU control unit failure: For instance, interference with the vehicle computer signals or false alarms from the vehicle computer. Solution: Reset the computer data.

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Should I upgrade the official ECU at a 4S dealership?

You can proceed with upgrading the official ECU at a 4S dealership. Below is relevant information about ECUs: 1. Description: Initially developed as an electronic device to coordinate the operation of various components in an internal combustion engine. During the early stages of automotive development, the simplest ECU modules only controlled the fuel injection quantity per engine cycle. More advanced engine controllers equipped in modern vehicles have become smarter and multi-threaded. Modern ECUs can control fuel injection ratios, air intake volume, ignition timing, ignition angle, and variable valve timing (VVT). 2. Common causes of damage: During welding repairs on the vehicle frame, failing to disconnect the ECU wiring connections. This is because welding repairs on the frame generate extremely high induced electromotive forces due to current variations, which can harm the ECU through the wiring.

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What does road surface inspection mainly detect?

Inspection items include soil, water, rocks, cement, etc. Below is the relevant introduction to non-destructive road surface inspection: 1. Introduction: Non-destructive road surface inspection refers to testing methods that can measure and inspect parameters such as thickness, reinforcement position, internal defects, and certain physical-mechanical properties without damaging the road surface. 2. Expansion: It is generally conducted using acoustic and electrical principles, radioactive isotopes, and electronic instruments. For example, microwaves or sound waves are used to reach the desired depth by selecting frequencies, and then the density, strength, and thickness of the road surface are measured based on differences in dielectric constant or sound speed in materials of different layers. The advantages are: no damage to the road surface; fast inspection speed (almost instantaneous); and the ability to inspect at any time and repeatedly.

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What are the conditions for returning or exchanging a car under the Three Guarantees Law?

Is it necessary to replace a damaged underbody felt panel?

Does White or Black Make a Car Look Bigger?

What Are the Causes of Insufficient Car Power?

What is the EPC Warning Light?

Should I upgrade the official ECU at a 4S dealership?

What does road surface inspection mainly detect?

Where is the temperature displayed inside the car?

How to Fix a Failed ETC Tag by Yourself?

What type of suspension does the Haval H2 have?

What causes the clutch to become hard to press when a Hyundai car gets hot?