Catalytic converters usually have long lifespans. Many can last up to a decade or more. But occasionally, these units do develop problems. Clogging is one common catalytic converter issue, and it has some surprisingly simple causes. Learning more about your converter and how it clogs can help you better understand how to fix the problem.
Can I Unclog My Catalytic Converter?
Knowing how to unclog a converter requires understanding how it works. Most units consist of five parts: a rectangular metal box, an intake pipe, an exhaust pipe, a metal honeycomb structure and chemical catalysts. The intake pipe lets engine exhaust enter the converter, where they’re broken down into less toxic byproducts by the chemical catalysts coating the metal honeycomb. Once these gasses are converted, they exit the unit.
You may wonder what makes exhaust gasses so harmful and how your converter breaks them down. Exhaust usually contains nitrogen oxides, carbon monoxide, hydrocarbons and volatile organic compounds. Your converter has two types of catalysts – a reductive catalyst and an oxidative catalyst. The first type converts nitrogen oxides into nitrogen and oxygen, while the second breaks down carbon monoxide and hydrocarbons into CO2 and water vapor. After conversion, these byproducts move out of your converter and eventually leave your vehicle.
Catalytic converters are pretty durable, but they can become clogged. When this happens, you may notice some common symptoms:
- Reduced fuel economy
- Sluggish engine performance
- “Check Engine” light is on
- Failing emissions tests
- Black smoke or rotten egg smells
- Unusual exhaust noises
Clogs can often result from leaking engine coolant or too heavy fuel mixtures. A misfiring engine may melt the metals inside your converter, which in turn causes clogs. If it’s not heavily clogged, you may be able to fix the problem on your own. But severely clogged converters will need to be replaced. Your catalytic converter price can vary based on what you’re driving and the type of converter you buy.
Effective Ways to Unclog A Catalytic Converter
You may naturally want to try unclogging your converter before shopping for replacements. You can accomplish this feat with a high-quality catalytic converter cleaner. Many auto parts retailers sell cleaners at reasonable prices. You should follow the specific directions on your cleaner’s packaging, but most cleaners work through a few simple steps:
- Make sure there’s plenty of gas in your tank before adding your cleaner.
- Add only the amount mentioned in the instructions.
- Drive your vehicle for at least 30 minutes. This circulates the cleaner so it will remove any clogs.
Shopping for a New Converter
If your converter is damaged or clogged beyond simple fixes, it’s time to go shopping for a new one. New converters start at around $180, depending on your vehicle’s make and model. High-performance versions exist, typically starting at around $1,000. Finding your converter is the easy part. Most auto parts retailers offer high-quality aftermarket models that fit your auto. You can locate these through your retailer’s make/model/year search feature or through the VIN lookup tool on its website.
