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Malfunctioning emissions system. Get this repaired. Engine probably running rich from a leaking fuel pressure regulator. If there is fuel in the vacuum line the regulator is bad.

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Q: Why does a 1991 Honda Civic LX exhaust smell like rotten eggs?
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Related questions

What makes a car smell like rotten eggs?

Car exhaust can smell like rotten eggs when the fuel has a lot of sulphur in it.


What if your car is rattling and exhaust smells of rotten eggs?

Most likely your exhaust is rattling and the smell is because your catalytic converter is bad


How do you fix rotten egg smell on a 2000 Cadillac DTS?

From exhaust?? Have catalytic converter checked.


Why does the mufflers on Nissan smell bad?

if the exhaust has a foul smell like rotten eggs most likely the cacatalytic convert is a bad


Rotten egg smell from exhaust and missing after warming up and driving?

time for a new calitic converter its befor the muffler on the exhaust system


How can you tell if your catalytic converter is broken?

most of the time you will smell a rotten egg smell if its bad, or if you hear a rattling noise coming from your exhaust


Why does my Mazda smell like rotten eggs?

You may have an exhaust leak. Better get it checked out. Any exhaust leaking into the cabin/passenger area can be potentially hazardous and deadly.


Why does your new Honda Civic smell like skunk?

probably the catalytic converter- or you child is smoking in the car


Why do some farts smell of rotten eggs?

Some farts smell of rotten eggs because they contain Hydrogen Sulphide - which is what gives rotten eggs their smell!


Does proscuito smell rotten?

proscuitto shouldn't smell rotten, it should smell salty and just a bit meaty.


What can you do to stop stinky smoke from coming out of your muffler?

There isn't much a person can do to stop the stinky smell of exhaust from the muffler. This smell, sometimes like sulphur or rotten eggs, is a by-product of the fuels burned.


If you smell rotten eggs all around how do you get rid of the nasty smell?

A rotten egg smell is usually a sign of a failing catalytic convertor and also at times failing oxygen sensors. try the cat first and that should alleviate your smelly problem. answer before you change expensive catalictic converter, try using a different brand of fuel sometimes fuel company additives will make your exhaust smell like rotten eggs