Is it necessary to reinstall the sound insulation cotton after it falls off the car bottom?

What is Fuel System Cleaner?

Fuel System Cleaner, commonly known as the third-generation gasoline detergent (also referred to as gasoline detergent or fuel additive), is designed to address carbon deposit issues in the fuel system of fuel-injected vehicles, quickly restore the engine's optimal working condition, and compensate for certain deficiencies in gasoline properties while imparting new beneficial characteristics (such as improving atomization, reducing wear, protecting the engine, and lowering emissions). Additional Information: 1. Fuel System Cleaner is a relatively new product that has emerged in recent years, commonly known as fuel additive (or gasoline additive). According to the instructions on these products' packaging, they are intended to compensate for certain deficiencies in gasoline properties, offering functions such as cleaning system carbon deposits, boosting octane ratings, improving atomization, reducing wear, and protecting the engine. When introduced into a vehicle's fuel intake system, it automatically cleans the system, removing deposits and maintaining the fuel injectors in optimal spray condition, thereby improving fuel combustion efficiency and saving fuel consumption. 2. As early as the "Standard for Controlling Harmful Substances in Motor Vehicle Gasoline" issued by the National Environmental Protection Agency, it has been clearly stated: "Gasoline should be added with fuel detergent that meets the specified requirements." This means that the gasoline supplied by gas stations already contains fuel detergent, and in principle, car owners do not need to purchase and add it separately. Moreover, the current market for "Fuel System Cleaner" is mixed with products of varying quality, and excessive use may potentially harm the vehicle. Therefore, it is recommended that car owners exercise caution.

2

Share

Why does the car fail to start due to brake failure?

The reasons for failing to start due to brake failure are as follows: 1. Brake shoe failure, abnormal or irregular wear; brake pads need to be replaced; 2. Oil leakage (brake fluid), insufficient brake fluid; simply replace the brake fluid; 3. ABS system failure, abnormal wheel speed sensor or wiring; check if the battery is low on power and charge it in time; 4. Spark plug failure, leading to an increased ignition gap, causing failure to start. Simply replace the spark plug. Additional information: 1. ABS system failure, abnormal wheel speed sensor or wiring, brake cylinder failure, such as fluid leakage or poor return. This situation indicates a parking brake system failure. It is recommended to contact professional maintenance personnel at a 4S shop to use a computer to check the specific fault content and then carry out targeted repairs. 2. If the vehicle's brakes fail, the vehicle is not allowed to drive. After the vehicle's brakes fail, the vehicle's braking system will be ineffective, and driving a vehicle without a braking system on the road is very dangerous. After the vehicle's braking system fails, the vehicle must be sent for repair immediately, and a tow truck can be used.

14

4

Share

What does M+ and M- mean in an automatic transmission?

M+ and M- are features found in vehicles with a manual-automatic transmission. The manual mode (M) of a manual-automatic transmission includes M+ and M-, allowing for both automatic and manual shifting. To use the manual mode, move the gear lever to the position between M+ and M-. Pushing the lever toward M+ shifts up one gear, while pushing it toward M- shifts down one gear. Additional information: 1. A manual-automatic transmission car refers to a vehicle equipped with a "manual-automatic" transmission, which combines both manual and automatic shifting modes. These transmissions have prominent +/- indicators, allowing the driver to manually switch gears by moving the lever to this position. 2. Structurally, a manual-automatic transmission is still an automatic transmission. Therefore, it retains some drawbacks of conventional automatic transmissions, such as relatively higher fuel consumption and limited modification potential. Additionally, since these transmissions are often imported, their cost is significantly higher than standard transmissions, leading to higher overall vehicle prices.

18

2

Share

What Do the Numbers on Tires Mean?

Tire model such as: 225/60-R17-99H, 225 represents the section width, simply understood as the width of the tire tread. 60 represents the aspect ratio, simply understood as the height of the tire sidewall. R represents the tire type code, where R stands for radial tire. 17 represents the rim diameter, indicating that the tire is suitable for 17-inch rims. 99 represents the load index of the tire, which is the maximum weight the tire can bear. A load index of 99 means the tire can bear a maximum weight of 775KG. H represents the speed rating of the tire, which is the maximum speed the tire can handle. A speed rating of H means the tire can handle speeds up to 210KM/H. Additional information: 1. Tire specifications: Car tire specifications are commonly represented by a set of numbers, where the first number indicates the tire section width, and the second indicates the rim diameter, in inches. 2. For example, 210/50R18 means a tire width of 210 millimeters, an aspect ratio of 50, and a rim diameter of 18 inches. The letters or symbols in the middle have special meanings: "X" indicates a high-pressure tire; "R" and "Z" indicate radial tires; "-" indicates a low-pressure tire.

8

0

Share

What is the comprehensive fuel consumption of the Jetta VS5?

Jetta VS5's comprehensive fuel consumption is 6.2-6.8L/100km. There are currently 5 models of Jetta VS5 on sale: the manual Yuexiang Pro and manual Jinqu Pro, with a comprehensive fuel consumption of 6.2L/100km. The automatic Yuexiang Pro, automatic Jinqu Pro, and automatic Rongyao Pro have a comprehensive fuel consumption of 6.8L/100km. The above figures are NEDC comprehensive fuel consumption, which are the fuel consumption data measured under the NEDC test procedure. The actual fuel consumption is higher than these values, ranging from 7.5-8.2L/100km. The level of a car's fuel consumption is directly related to five major factors: driving habits, the car itself, road conditions, natural wind, and environmental temperature. Specific factors that can increase fuel consumption are as follows: Driving habits: Aggressive driving, such as sudden acceleration, frequent overtaking, and not easing off the throttle before a red light, can increase fuel consumption. The car itself: Cars with larger displacements generally consume more fuel than those with smaller displacements because larger displacements usually mean greater power, requiring more gasoline to burn and perform work. Heavier cars also consume more fuel because greater weight requires more driving torque. Road conditions: Driving on dirt roads, muddy roads, soft surfaces, or mountainous roads increases resistance and fuel consumption. Natural wind: Driving against the wind or on windy days increases the car's resistance and fuel consumption. Low environmental temperature: When the engine block temperature is low, the gasoline injected during a cold start does not atomize easily, requiring more gasoline to be injected for combustion, which increases fuel consumption. Additionally, at low temperatures, the engine's computer will control the engine to run at higher RPMs to warm up, which also increases fuel consumption.

10

2

Share

How to Tell if the Catalytic Converter Has Been Removed?

You can check by its appearance. A normal catalytic converter should have uniformly arranged and evenly sized pores in its internal porous ceramic, which should also be clean and relatively white (a yellowish beige color indicates a counterfeit). The porous ceramic inside the catalytic converter serves as a carrier and should be firmly and securely assembled with the outer shell, with no signs of looseness. A replacement catalytic converter should match the original factory specifications in terms of size, the material of the internal porous ceramic, the arrangement of the pores, and the number of rows. Additional information: 1. The catalytic converter is the most important external purification device installed in a car's exhaust system. It converts harmful gases such as CO, HC, and NOx emitted from the car's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. 2. When high-temperature exhaust gases pass through the purification device, the catalyst in the catalytic converter enhances the activity of CO, HC, and NOx, promoting specific oxidation-reduction chemical reactions. CO oxidizes at high temperatures into colorless, non-toxic carbon dioxide gas; HC compounds oxidize into water (H2O) and carbon dioxide; and NOx is reduced into nitrogen and oxygen. These three harmful gases are transformed into harmless gases, thereby purifying the car's exhaust.

9

4

Share

Is it necessary to reinstall the sound insulation cotton after it falls off the car bottom?

What is Fuel System Cleaner?

Why does the car fail to start due to brake failure?

What does M+ and M- mean in an automatic transmission?

What Do the Numbers on Tires Mean?

What is the comprehensive fuel consumption of the Jetta VS5?

How to Tell if the Catalytic Converter Has Been Removed?

How Many Kilometers Should the Transmission Oil of a Small Car Be Changed?

Why does the engine shake when stationary in D gear?

What Causes the Decrease in Coolant?

Where Does the Airbag Deploy From?