How to Unclog a Clogged Catalytic Converter

If you have any sort of vehicle that runs on fuel, you have a catalytic converter. It can get clogged or get poisoned. That is why you need to know how to unclog a clogged catalytic converter. In this article we will show you how you can get rid of the clogged catalytic converter.

What is a catalytic converter?

A catalytic converter is a device that controls your emission through the exhaust. It catalyzes with the gas that a motor vehicle produce and makes it less harmful for the environment when it gets released. This is a device that all the motor vehicles have in their exhaust system. The pollutant gas gets converted to less harmful ones.

How to know that your catalytic converter is clogged?

You cannot inspect the catalytic converter, so there is no way to see inside of it that lets you know if it’s actually clogged or not. It’s really important to understand if your catalytic converter is clogged. Most of the time it fails and shows some symptoms, but its better if you check it out every time you get your car serviced.

If your car misfires, it overheats your exhaust system. If your fuel mixture is rich, then it can produce the misfire and overheat your exhaust that will cause the catalytic converter to melt and get clogged. Your cars performance will be decreasing and its one of the symptoms of a clogged converter. Your car won’t go faster. Bad exhaust valves on the engine can also cause the clog.

How to unclog a clogged catalytic converter?

How to Unclog a Clogged Catalytic Converter
Catalytic converter

The only way to truly understand if your catalytic converter is clogged is if you open it up and take a look for yourself, which is illegal. There is no temporary solution but you can try some methods to unclog it.

  • Take your car to the highway

Drive your car on a highway and drive at the speed limit for 1 to 2 miles. Check your mirror and find a place where you can decelerate quickly. Push down the breaks and repeat the process with safety precaution. If you see that your performance has improved, the catalytic converter has been unclogged.

  • Tell your mechanic to open to dismantle it and open it up. If the ceramic material inside the converter has melted, you need to change it.
  • If the converter has melted badly and clogged the whole system, you might need to change the whole thing. Cops can fine you if your exhaust is not working as it’s supposed to be.
  • The catalytic converter may have stocked up on the filth that was sent out by the faulty fuel injection. Bad fuel can do this to your exhaust. You can heat up the exhaust by revving and make sure the filth inside it has melted or has been pushed out.
  • Drive a steel rod through the center of your exhaust and clean the pipe. It’s a risky procedure as you can damage the exhaust system. So, we do not recommend you to do it.
  • You can use a vacuum or psi gauge to connect one of the hoses of the EGR DPFE sensor to clean it up.


To unclog your clogged catalytic converter, you should know what you are doing before actually doing it. We highly recommend you to take your car to the nearest garage to be checked out and change the cat. Be advised that you can get fined and the fine is much higher than normal ones. So check if your catalytic converter is clogged and unclog it before you take it out for a spin!

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