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What Causes Black Exhaust Pipes in Cars?

1 Answers
VanStephen
07/29/25 8:59am
Blackening of a car's exhaust pipe is related to the engine's combustion conditions, primarily caused by incomplete fuel combustion leading to carbonization and accumulation of oil vapor, which is a normal phenomenon. Here are the reasons for incomplete combustion: 1. Poor spark plug performance resulting in insufficient fuel combustion in the cylinder. Solution: Repair the spark plug. 2. Incorrect engine ignition timing causing the engine to malfunction. Solution: Adjust the ignition timing. 3. Bad driving habits during startup, insufficient cylinder pressure, or excessively low engine temperature. Solution: Adjust driving habits.
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What is the fuel tank capacity of the 8th generation Accord?

The fuel tank capacity of the 8th generation Accord is 70 liters, which is the officially announced data. The 8th generation Accord uses 92-octane gasoline, with a fuel consumption of 7.9-10L per 100 kilometers. A full tank can cover a distance of 700-886km. During daily driving, it is necessary to pay attention to the remaining fuel level in the tank. Generally, the fuel level is observed through the fuel gauge inside the car. If there are no other issues, the fuel level will be accurately reflected on the gauge. The fuel gauge typically has 5 to 6 segments, and it is advisable to refuel when there are only 2 segments left to avoid running out of fuel midway. During the actual refueling process, the amount of fuel may exceed the marked capacity. This is because the fuel tank capacity marked by the car manufacturer is the volume from the bottom of the tank to the safety limit, and there is still some space from the safety limit to the tank opening. This space ensures that the fuel in the tank can expand when the temperature rises without overflowing the tank's safety space. If the fuel is filled up to the tank opening during refueling, the actual refueling amount may exceed the marked fuel tank capacity.
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What is the tire model for the 2017 Ford Escort?

2017 Ford Escort tire model is 205/55R16. The first number 205 represents the tire width of 205MM, 45 indicates the tire aspect ratio is 55%, meaning the section height is 55% of the width, the letter R stands for radial tire, and 16 represents the rim diameter of 16 inches. The 2017 Ford Escort has a fuel consumption of 5.7L per 100km. In addition to the model, tires are also marked with the following common data: Tire cord material: Indicated by Chinese pinyin, such as M-cotton cord, R-rayon cord, N-nylon cord, G-steel cord, ZG-steel radial cord. Speed rating: Indicates the maximum speed at which the tire can carry a specified load under specified conditions. Letters A to Z represent certified speed ratings from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h; Rim specification: Indicates the rim specification compatible with the tire for practical use, such as "Standard Rim 5.00F".
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Does the Accord have a 2.0t engine?

The tenth-generation Honda Accord in China does not have a 2.0t engine, only a 1.5t engine. However, the 2.0t engine is available in foreign markets. The tenth-generation Honda Accord was launched in North America, featuring a 2.0T10AT powertrain as its main offering. Below is more extended information about engines: An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. The term engine can refer to either the power-generating device or the entire machine including the power unit. The original meaning of engine refers to a "mechanical device that generates power." External combustion engine: Its fuel burns outside the engine, invented in 1816 by R. Stirling of Scotland, hence also known as the Stirling engine. The engine converts the thermal energy generated by this combustion into kinetic energy. The steam engine improved by Watt is a typical example of an external combustion engine. When a large amount of coal burns to generate heat, heating water into a large amount of steam, high pressure is produced. This high pressure then drives mechanical work, completing the conversion of thermal energy into kinetic energy.
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Should You Press the Brake When Shifting Gears in an Automatic Transmission Car?

When shifting gears in an automatic transmission vehicle, it is not necessary to press the brake. First of all, if the vehicle is in motion, it means the gear is already in D (Drive) mode. At this point, shifting gears usually involves switching to S (Sport) or M (Manual) mode. Automatic transmission vehicles do not allow shifting to N (Neutral), P (Park), or R (Reverse) while driving. More details are as follows: 1. In an automatic transmission car, the brake pedal only needs to be pressed when shifting to P (Park) mode. For other gears, normal manual control is sufficient without the need for assistance from the right foot. This is primarily because, in P mode, there is a control lock valve that must be released by pressing the brake pedal before the gear can be shifted from P to other modes (parking gear shift). 2. When driving at high speeds, the vehicle is typically in D mode. If a gear shift is required, it is usually to N, S, or M mode. Shifting to N mode is intended to cut off the engine's power transmission. Shifting to S or M mode is mainly for acceleration purposes. In such cases, when an automatic transmission vehicle shifts from D to M (or S) at high speed, if the driver presses the brake while shifting, the vehicle's original trajectory of acceleration is disrupted. This sudden braking causes the speed to drop, resulting in the vehicle oscillating between acceleration and deceleration, which would undoubtedly lead to a very poor driving experience.
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Does the eco mode of Lavida harm the car?

Lavida's eco mode does not harm the car. The eco mode is the car's energy-saving mode. After turning on the energy-saving mode, the car will operate in an energy-efficient manner, thereby reducing fuel consumption. The eco mode can be used in urban areas as well as during highway cruising. Taking the Lavida 2021 280TSI DSG Comfort Edition as an example: it is a compact car launched by SAIC Volkswagen, with dimensions of 4670mm in length, 1806mm in width, and 1474mm in height, and a wheelbase of 2688mm. It is equipped with a 1.4T turbocharged engine and a 7-speed dual-clutch transmission.
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How Long Can Car Recirculation Mode Be Fatal?

Car recirculation mode can be fatal within 20-30 minutes. To prevent suffocation in the car, follow these steps: 1. Ventilate frequently by opening windows: If you need to stay in the car for an extended period, it is recommended to open the windows for ventilation. Even if you don't want to roll down all the windows, at least leave a small gap. This gap could be life-saving, whether in the scorching summer or freezing winter. 2. Switch to fresh air mode: Many car owners prefer to keep the recirculation mode on continuously, but this can cause a rapid drop in oxygen levels inside the car. Therefore, when resting, it is advisable to switch from recirculation mode to fresh air mode to maintain proper air circulation.
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