Rotten Egg Smell from My Car?


A car will smell like rotten eggs if there is a problem with the catalytic converter on the exhaust of the vehicle. This indicates there could be an exhaust leak somewhere and needs attention. High sulfur fuels have more of an odor. Many fuels are now made with less sulfur. The sulfur in fuel burns in oxygen when the car starts and turns into sulfur dioxide. The sulfur is oxidized building up sulfates. This residue can cause build up in the catalytic converter creating an exhaust problem. The smell is usually present when a vehicle starts but if the smell persists then there is a problem with the oxidation process.
Q&A Related to "Rotten Egg Smell from My Car?"
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