What Are the Solutions for Foul-Smelling Car Exhaust?
2 Answers
Solutions for foul-smelling car exhaust include: using gasoline detergent to clean carbon deposits and impurities from the entire fuel system, including the intake tract, intake valve, and combustion chamber. If the odor persists after cleaning the carbon deposits, the vehicle should undergo maintenance, with a focus on checking the oxygen sensor and its wiring, ECU faults, and the intake system. Causes of unpleasant car exhaust include: 1. Poor fuel quality: For example, gasoline containing too many impurities, heavy metals, or water can lead to foul-smelling exhaust emissions. 2. Incomplete combustion of the air-fuel mixture: Mainly due to an overly rich mixture, which can impair the purification capability of the catalytic converter. Car exhaust contains a large amount of harmful substances, including carbon monoxide, nitrogen oxides, hydrocarbons, and solid suspended particles. Purification measures such as catalysts or water washing can be employed.
As a car enthusiast, I've noticed that exhaust odors typically stem from incomplete engine combustion, most commonly due to a faulty oxygen sensor causing insufficient fuel burning or a failed catalytic converter unable to transform harmful gases. When addressing this, first start the car to listen for abnormal sounds or black smoke, check if the dashboard warning light is on, and use an OBD scanner to read trouble codes and pinpoint the issue. If the oxygen sensor is defective, replace it immediately; for catalytic converter problems, seek professional inspection and repair to prevent greater damage. In daily use, I opt for high-quality fuel to reduce impurities and change the air filter every 5,000 kilometers to maintain smooth airflow. Exhaust odors are harmful—inhaling them can damage lungs and pollute the environment—so don't delay if detected. If you can't fix it yourself, promptly send it for repairs to prevent minor issues from escalating. Regular maintenance is key to saving both hassle and money.
