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Specializing in the production of exhaust mufflers and catalytic converters


What makes a 3-way catalytic converter turn red and possibly melt the carrier?

Release Time:

2023-10-09


The surface of the three-way catalytic converter will turn red, when the fuel passes directly through the carrier and there is enough oxygen to make the fuel burn. It is not the catalytic converter itself that causes this phenomenon, but the fuel system and ignition system that allows unburned fuel to pass through the engine to the three-way catalytic converter. If the engine is not adjusted, the carrier in the new three-way catalytic converter will also be burnt. Usually, the factors that cause the three-way catalytic converter to melt are:

1) Carrier burnout occurs when the mixture is too rich; and

2) Rich combustion of the car engine with leakage from the exhaust system, when air enters the exhaust system and mixes with excess fuel, it will cause the three-way catalytic converter to burn out; and

3) Automotive engine misfire. When a mixture of air and fuel is not burned in the engine, it will enter the three-way catalytic converter through the exhaust pipe and burn out the three-way catalytic converter.

What makes my three-way catalytic converter clogged (car lose power)?

If the three-way catalytic converter has been running at high temperatures for a long time, the carrier will melt and become a solid mass. The car reacts sluggishly as if it has lost some of its power. Other possible causes are:

1) The front three-way catalytic converter has been damaged and the resulting carrier debris is blocking the rear three-way catalytic converter.

2) The liner of the three-way catalytic converter is damaged and cannot continue to hold the carrier in place, the carrier has come loose and is blocking the exhaust passage.