Low-Grade Fuel

courtesy of Bob, The Auto Answer Man

Hi Bob,
We recently purchased a 1997 Toyota 4Runner. It seems to run well. However, every once in a while after we stop, it emits a really foul odor similar to rotten eggs. This happens maybe twice a week. Is this anything we should be worried about?

That smell is sulfur. It is being burned off of the catalytic converter. It comes from using low-grade fuel. You can clean it up by running some premium grade fuel from a national brand. Then, take the car out on the freeway and get it good and hot. It may take several tank fulls of good fuel to get all of the bad stuff out of there.
Good Luck!
Drive Safely!
Bob, The Auto Answer Man

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