What are the effects of a clogged three-way catalytic converter?
4 Answers
The impacts of a clogged three-way catalytic converter include the following aspects: 1. The rear oxygen sensor sends a signal, causing the engine fuel injector to spray more fuel, and the engine alarm signals oxygen sensor poisoning. This is generally caused by poor gasoline quality, incomplete combustion at low gears and speeds, severe engine carbon buildup, or after carbon cleaning, revving the engine to expel carbon deposits onto the three-way catalytic converter, all of which can lead to clogging. In severe cases, the exhaust may emit a foul odor. 2. There may be a slight decrease in power and increased fuel consumption. During vehicle inspections, the exhaust may fail to meet standards. You can use a lift to remove, clean, and soak the converter. Generally, there are professional cleaning agents available, or even toilet cleaner or oxalic acid can be used. It's also advisable to clean the rear oxygen sensor at the same time. For minor cases, driving at high speeds can help. 3. If you're not driving fast, it can still help to increase the engine speed. (Generally, for manual transmission vehicles, shift gears above 2000 RPM to avoid prolonged idling and use high-quality fuel.) This can help remove some of the clogged parts. Remember not to strike it, as the interior is made of ceramic material.
When driving to work, I noticed the car accelerates very slowly. It used to zoom off with just a light press on the gas, but now it feels like dragging a heavy load and consumes much more fuel, with the average fuel consumption soaring from 8 liters to over 11 liters. The exhaust pipe often makes a 'popping' sound, and the exhaust emission warning light came on. Later, a check revealed that the catalytic converter was completely clogged. After the blockage, the exhaust couldn't flow smoothly, the engine couldn't 'breathe,' performance plummeted, fuel consumption skyrocketed, and the exhaust emissions exceeded standards. Over time, it could damage surrounding engine components. It's advisable to pay attention to sluggish acceleration or abnormal fuel consumption, and address any issues promptly rather than waiting until the engine warning light comes on or it overheats, as repairs become more complicated by then.
I love tinkering with cars myself and have had the catalytic converter clog a few times, mainly due to too much carbon buildup from using low-quality gasoline. When it's clogged, it severely affects engine response, making the car sluggish at startup and rapidly increasing fuel consumption. The exhaust fumes from the tailpipe also smell bad, filling the entire garage with an unpleasant odor. Simple DIY checks include listening for muffled exhaust sounds or using an OBD tool to read fault codes. The impacts are significant—lower engine efficiency, failed emissions tests, and potentially shortened catalytic converter lifespan. I recommend using high-quality gasoline and regular maintenance to prevent carbon buildup, saving both money and hassle.
I am particularly concerned about environmental issues. When the catalytic converter is clogged and fails, the exhaust treatment system becomes ineffective, leading to a significant increase in harmful gas emissions such as carbon monoxide and hydrocarbons, polluting the air. While driving, I can clearly feel the excessive emissions, and it even fails the annual inspection. This not only violates environmental regulations but also exacerbates air pollution. I recommend addressing similar issues promptly to minimize environmental harm and developing good habits like regular maintenance of the exhaust system.
