What Causes Smoke from a Car Engine?

1 Answers
LucilleLynn
07/29/25 9:29am
Car engine smoke can be caused by: 1. A small fuel injection advance angle leading to incomplete combustion; 2. Minor water leakage in the cylinder liner or water present in the fuel; 3. White smoke during cold starts that disappears as the engine warms up; 4. Air-fuel ratio imbalance, decreased cylinder pressure, premature fuel injection timing, or failure of the smoke limiter on the fuel injection pump; 5. Malfunctioning exhaust brake system; 6. Engine burning oil; 7. Wear of engine cylinder liners, stuck piston rings, misalignment, aging and deformation of valve seals, excessive valve guide clearance; 8. Engine oil entering the cylinder through the intake tract.
Was this review help?
10
1
Share
More Forum Discussions

What is the difference in sound between S-type mufflers and M-type mufflers?

S-type mufflers and M-type mufflers are both types of car exhaust systems, differing in their methods of handling exhaust gases. Car S-type muffler: Features two expansions, with the S-shaped bend clearly visible in its design. Its clever construction avoids the issue of oversized mufflers that are difficult to install. A high-quality S-type muffler modification can increase horsepower by more than 7%, and the exhaust sound takes on a race-car-like quality. However, it may result in some loss of low-end torque. The S-type muffler enhances torque at medium to low speeds, providing quicker acceleration, better hill-climbing power, and a deep exhaust note without sacrificing high-RPM horsepower. It primarily works by extending the formation of exhaust gases to boost performance. Car M-type muffler: Incorporates a valve within the backpressure muffler that automatically adjusts its opening based on the volume of airflow. At low speeds, the valve remains closed, maintaining sufficient backpressure to improve torque, thereby making the vehicle more powerful at low speeds. As speed increases, the airflow gradually rises, causing the valve to open progressively until it is fully open at high speeds, allowing exhaust to flow completely unobstructed. This results in smoother and more powerful driving performance.
12
0
Share

How to set up the dashboard of Changan CS35 Plus?

The meter can display the total accumulated mileage and the single trip mileage. The meter will only work when the ignition is turned on. Press the menu button once to enter the hour adjustment mode. Use the reset/adjust button 9 to adjust the hours, each press of the button. Turn off the ignition, hold down the reset/adjust button. Turn on the ignition, then release the button. Press the button, and the service interval indicator will be reset to zero.
18
2
Share

What is the solution for soft brakes on the BAIC Huansu S3?

It is necessary to check whether the brake pads and brake discs are excessively worn and whether the brake fluid needs to be replaced. After inspection, perform the corresponding replacements. Brake pads or brake discs should be replaced promptly. Additionally, it is essential to check for internal leaks in the brake master cylinder and wheel cylinders.
10
1
Share

Can a new car with over 1,000 kilometers drive on the highway?

A new car that has been run-in for 1,000 kilometers can drive on the highway, but the speed should not exceed 100 km/h. Break-in period for a new car: The initial stage is 0 to 500 km, with the speed maintained at 60 to 70 km/h; the middle stage is 500 to 1,000 km, where the speed can be increased to 90 to 100 km/h; the later stage is 1,000 to 2,000 km, where the speed can be increased to below 120 km/h. During the entire break-in period, it is necessary to control the speed and RPM, avoid aggressive driving, sudden acceleration, hard braking, and sharp steering. Precautions for driving on the highway: When driving on the highway, maintain a safe distance from the vehicle in front. At speeds above 100 km/h, keep a distance of at least 100 meters. There are distance confirmation markers on the highway to help gauge the distance. Stay away from trucks; when driving at high speeds, do not drive side by side with trucks or follow closely behind them—try to overtake them instead. Stay in the middle lane; the leftmost lane on the highway is typically the overtaking lane, while large trucks usually stay in the rightmost lane.
2
0
Share

How to Adjust the Steering Wheel of Beijing Hyundai?

Steering wheel adopts mechanical adjustment method, which can be adjusted telescopically in the front and rear directions as well as up and down. Sometimes the lock release lever does not lock the steering wheel, which is not a malfunction. Pull down the lock release lever on the steering column to adjust the angle and position of the steering wheel. Move the steering wheel towards the driver's chest rather than the face.
2
0
Share

Which Province Has Canceled Gear Shifting?

Guangdong Province has canceled gear shifting. Benefits of canceling gear shifting: For students who are not very proficient in gear shifting, canceling it is a blessing. They no longer have to worry about failing due to shifting into the wrong gear. The gear shifting test not only requires correct gear selection but also matching speeds. For example, shifting into fourth gear at 20 km/h would still result in failure. After canceling gear shifting, if the speed does not match, the maximum penalty is a deduction of 10 points, and the test is still considered passed. Correct techniques for gear shifting in Subject 3: Upshifting: Start by pressing the clutch, shift into 1st gear, engage the half-clutch and accelerate. When the speed reaches around 15 km/h, release the throttle, press the clutch, and shift into 2nd gear. Release the clutch and accelerate. When the speed reaches around 25 km/h, release the throttle, press the clutch, and shift into 3rd gear. Release the clutch and accelerate. Downshifting: Press the brake to reduce speed below 20 km/h, release the brake, press the clutch, and shift into 2nd gear. Continue braking to reduce speed below 10 km/h, release the brake, press the clutch, and shift into 1st gear.
15
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.