What are the symptoms of a car without a catalytic converter?
2 Answers
Shortly after the vehicle starts, the exhaust manifold emits a noticeable red combustion phenomenon towards the catalytic converter, and a hissing sound of air leakage and gurgling noise can be heard when accelerating. Below is an introduction to the catalytic converter: 1. Working principle: When high-temperature exhaust gases pass through the purification device, the purifying agent in the catalytic converter enhances the activity of CO, HC, and NOx gases, promoting certain oxidation-reduction chemical reactions. CO is oxidized into colorless, non-toxic carbon dioxide gas at high temperatures; HC compounds are oxidized into water (H2O) and carbon dioxide; NOx is reduced into nitrogen and oxygen. The three harmful gases are transformed into harmless gases, thereby purifying the vehicle's exhaust. 2. Electronic fuel injection system: The electronic fuel injection system in a car engine generally consists of three main parts: the fuel injection circuit, sensor group, and electronic control unit. If the injector is installed in the position of the original carburetor, meaning there is only one gasoline injection point for the entire engine, this is called single-point fuel injection. If injectors are installed on the intake pipe of each cylinder, meaning gasoline is injected into the cylinders from multiple locations (at least one injection point per cylinder), this is called multi-point fuel injection.
My old car's catalytic converter is broken and I removed it directly, the symptoms are very obvious. The exhaust smell has become extremely unpleasant, like rotten eggs, so pungent that it's unbearable even inside the car, and rolling down the windows doesn't help. The check engine light on the dashboard stays illuminated in yellow, indicating a problem, but the car still drives okay. The exhaust sound is louder and rougher, with an annoying buzzing noise during acceleration. What's worse is it definitely won't pass the annual inspection - last time I almost got fined for excessive emissions. Fuel consumption hasn't changed much, but the car doesn't run as smoothly as before, with slightly sluggish acceleration. I advise fellow car owners not to neglect this component - fixing it not only saves hassle but also protects the environment and avoids violations.
