What Does a Clean Exhaust Pipe Indicate?

1 Answers
DeJuliana
07/29/25 1:49pm
A clean exhaust pipe indicates that the car has been driven very little, or that the combustion inside the engine is very efficient. Additional information: Reasons for a blackened exhaust pipe: The exhaust pipe turns black because some of the exhaust gases contain unburned fuel mixture, which over time causes the pipe to blacken. A blackened exhaust pipe is normal and should not be used to judge the engine's working condition. Measures to reduce exhaust pipe blackening: To keep the engine in good condition, regular maintenance is essential. Use high-quality gasoline with the correct octane rating. Prolonged use of low-quality gasoline can lead to increased carbon deposits in the engine, which may cause knocking. Knocking reduces engine power and increases fuel consumption. Knocking is an abnormal combustion phenomenon in the engine. During the compression stroke, the piston moves upward to compress the fuel-air mixture, causing its temperature and pressure to rise.
Was this review help?
4
3
Share
More Forum Discussions

How to Cast Navigation Screen on Lavida Plus?

Steps to cast navigation screen on Lavida Plus: 1. Swipe down from the top of the device to open the quick settings menu and select the multi-screen interaction option; 2. On the multi-screen interaction page, it will automatically search for castable devices; 3. In the casting search results page, select the casting device to automatically start screen casting. Taking the 2021 Lavida Plus as an example, its body structure is a 4-door, 5-seater sedan with body dimensions of 4670mm in length, 1806mm in width, and 1474mm in height, with a wheelbase of 2688mm. The 2021 Lavida Plus features a MacPherson strut front suspension and a torsion beam rear suspension. It is equipped with a 1.4T turbocharged engine, delivering a maximum horsepower of 150PS, a maximum power of 110kW, and a maximum torque of 250Nm, paired with a 7-speed dual-clutch transmission.
13
0
Share

What Are the General Dimensions of Car Rear Seats?

Car rear seat dimensions are generally as follows: seat height is approximately 930mm, rear seat cushion height is around 350mm, rear seat cushion length is about 460mm, and rear seat width is roughly 1480mm. Seats are the seating areas used when riding in a car, divided into front seats and rear seats. The installation method for rear seat cushions is as follows: 1. Remove the rear seat headrest and place the seat back cover over the backrest. 2. Secure the top of the seat cover with hooks and tuck the bottom into the gap between the backrest and the seat cushion using the cushion retainer. 3. Place the seat cushion cover over the rear seat and again secure it by tucking the cushion retainer into the gap between the backrest and the seat cushion. 4. Reinstall the rear seat headrest and place the headrest cover over the headrest, securing it with clips.
17
4
Share

Why does the Nissan Qashqai make a clicking sound and fail to start?

Here are the possible reasons why the Nissan Qashqai makes a clicking sound and fails to start: 1. Reason one: The battery is faulty and cannot store power. If you can only hear the sound of the starter when trying to start the car, it is very likely that the battery is dead and unable to start the engine. 2. Reason two: The starter motor is faulty and cannot drive the flywheel to rotate. Check if the starter motor is working when attempting to start the vehicle. 3. Reason three: The vehicle's ignition system is faulty. Remove one of the ignition high-voltage wires from the engine, insert an old spark plug or other pen-shaped metal rod into the spark plug cap, and place the spark plug body or metal rod near the engine's metal part. Start the engine and observe if there is any high-voltage spark jumping. If not, check for issues with the ignition system.
2
4
Share

What to Do When the BMW X3 Electronic Parking Brake Won't Release?

If the electronic parking brake of the BMW X3 won't release, you can follow the steps in the manual to release it sequentially. Here is some information about BMW: 1. Introduction: BMW (abbreviated as BMW) is a German automotive brand under the BMW Group. 2. Content: It has four model series: i, X, Z, and pure numbers, as well as series such as 1, 2, 3, and the M series (BMW's official high-performance modification division) based on improvements to these series. The BMW logo's B.M.W. stands for Bavarian Motor Works, and the colors and combination of the logo come from the state emblem of Bavaria, where BMW is headquartered. 3. Development: On June 21, 2021, BMW ranked 71st in the 2021 Kantar BrandZ Most Valuable Global Brands ranking with a brand value of $24.821 billion.
9
2
Share

Why Do Large Vehicles Need to Add Urea, and What Role Does It Play?

Adding urea to large vehicles is to reduce harmful nitrogen oxides in the exhaust into nitrogen and water, which can decrease nitrogen oxide compounds in vehicle emissions, reduce pollution, and improve the environmental friendliness of the vehicle. The consequences of not using urea include: 1. Exceeding emission standards, causing environmental pollution; 2. Oxidation of chemicals in the vehicle system, leading to clogging of the urea nozzle and rendering the entire system useless; 3. Reduced vehicle power. The role of urea is: to treat exhaust gases, reduce pollutants in the emissions, and optimize engine performance and fuel consumption. Reasons for urea warning light activation include: 1. Urea pressure too low, high urea consumption; 2. Insufficient power, urea consumption too high or too low; 3. Instrument panel malfunction. Methods to eliminate urea warning light alerts are: 1. Replace the urea solution; 2. Replace the water heating valve; 3. Replace the urea pump and power supply module plug.
8
5
Share

Is the Fengxing T5EVO electric or fuel-powered?

The Fengxing T5EVO is a fuel-powered model. Below are the relevant details: 1. Dimensions: The new vehicle measures 4565/1860/1690mm in length, width, and height, with a wheelbase of 2715mm, paired with 19-inch blackened alloy wheels. 2. Powertrain: Equipped with a Mitsubishi 1.5TD high-performance engine, delivering a maximum power of 145Kw and a peak torque of 285N·m. It accelerates from 0-100km/h in 9.5 seconds, with a fuel consumption of 6.6L per 100km. 3. Safety: The Fengxing T5EVO adopts a more stringent five-star crash safety design, with high-strength steel accounting for over 76% of the body structure. Additionally, the hot-stamping technology achieves a yield strength comparable to nuclear submarine-grade steel, leading its class.
1
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.