Can anyone help with Impala 2011 rotten eggsmell?

find out ..is the engine temp about righ?. ..if ok is the engine getting too much fuel to the intake?

I suppose it is good, the dealer checked everything. The temperature gauge is reading normal. There are no service engine lights on. They just keep telling me it's the fuel.

the roten egg smell is desinetly sulfur....My guess would be to use 91 of a high quality gasoline. ie. shell ,chevron, 76, for at least the next 4 to 5 tank fulls and hopefully the smell will go away once you have completely replaced all the old gasoline wiht the new higher quality stuff. i had to do this to my 07 impala LT because my check engine light would come on after i had driven 55 mph for longer than 1 hour 1/2 straight(3 hour trip to pick up my son.) trying to hyper mile it, got great mileage! It finally worked, but i was using a inferior gasonine. So if they say its the gasonline then that would be my best guess. It worked for me, might work for you

try upgrading your fuel to a higher octane i use 94 octane in my 2006 impala ss

the smell can be caused by long idle time.. or keeping your foot glued like lead to the floor.. anyway the smell is from the gas, buy gas some where else, the smell should go away with time and milage

all replys make good since,but best way to answer your question,is this crappy gas we have today,it messes with your cat converter.would be a good idea to have it checked,even with 11,000 miles,it could be clogging up causeing the smell.the ethonol even 10% in the gas as they claim is not good for the fuel system,I would recomend at least every 5th fill up putting in a brand name fuel injector cleaner in it,the gas tank.will keep your fuel system clean.

the smell could be your battery going up

say what.

i have the same problem. 2010 impala. No codes. Tried 5 different fuels.

2014 Chevy Impala 20000 miles on it and I noticed the egg smell in the cabin. It is random that the smell shows up but when it does it takes a min to go away.