Catalytic Converter Systems: What Does that Egg Smell Mean? Catalytic Converter Systems: What Does that Egg Smell Mean?
One of the catalytic converter symptoms of a problem with the device is a sulphurous smell. This is the most obvious symptoms of catalytic converter failure. This smell is caused by a problem in the fuel mixture in the exhaust.
Air to Fuel Ratio
If there is an imbalance in the fuel mixture of your vehicle, the result could be an excess of sulphur being burned as the converter operates. The smell of burning sulphur has been compared to that of a rotten egg. A smell of this type is an indication to have your vehicle inspected as soon as possible.
Excess Carbon Dioxide
A engine running properly will produce an excess of carbon dioxide. The role of the catalytic converter is to convert the carbon dioxide to an emission that is less harmful to the environment. Faulty converters cause fuel that is not yet burned to be emitted through the exhaust system. The hydrogen sulfide that is emitted has a rotten egg smell. This is a sign that the converter will need to be replaced. The intake vacuum and back pressure of the exhaust can be measured by an automobile mechanic to verify and address the problem.