Rotten egg smell when driving forty five to sixty five mph

2010 CHEVROLET AVEO
69,000 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC
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COOLOLDS85
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I have been smelling rotten eggs occasionally when driving between forty five and sixty five MPH. It does not smell like that all the time. Just every once and awhile while accelerating. Does anyone know if this would work? I know it works for fuel system cleaning, but would it clean out my exhaust? I am thinking maybe the catalytic converter or exhaust is clogged and needs to be cleaned. I do not want to risk buying a catalytic converter destroying anything if I use this product. A lot of people got good results. But I want a professional opinion so I will not need to buy a catalytic converter in months ahead for using this product because it destroyed it. The point is, is it safe to use without defecting any of the exhaust components and experiencing any problems down the road because of the product?

Hi-Gear HG3270e EZ Emissions Pass & Catalytic Converter Cleaner, 15 fl. oz.
Aug 3, 2018 at 8:45 AM
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ASEMASTER6371
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Good afternoon.

The reason it smells that way is because the engine runs rich. There is too much fuel in the catalytic converter. When this happens, not all the gases get processed. When that happens sulfuric acid is formed thus the rotten egg smell.

That product will not do anything. You need to have someone check the engine. They need to pay attention to the long term trims to see if it is running rich. If it is then the reason must be found and repaired.

Once the engine is running lean again, the smell will go away on its own.

Roy
Aug 3, 2018 at 10:11 AM
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COOLOLDS85
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What if it passes emissions and the engine runs good still? Could it hurt anything then? It is not like I smell it constantly.
Aug 3, 2018 at 1:20 PM
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ASEMASTER6371
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It can pass emissions. All they look at is the fact it has all monitors set and no current failures in the fuel system.

Yes, you can drive it but if you do not do anything, it will damage the interior of the catalytic converter over time. Then you will need to replace it and still have to find out why it was running rich.

Roy
Aug 3, 2018 at 2:05 PM