rotten egg smell in 91 lumina

[wyley187]

i Have a 91 lumina that has recently started hesitating after warming up or idling for 5-10 minutes and there is a horrible rotten egg smell after driving for about 5 miles plz help

[jeffcoslacker]

Your catalytic convertor is on it's way out.

[maxwedge]

Could be a problem with coolant temp sensor staying in the cold range, this may not set a code and would cause a rich mixture, could cause some cat odor, another possiblity here, but less likely than the cat. A scan will reveal if the temp sensor is accurate.

[wyley187]

Originally Posted by maxwedge

Could be a problem with coolant temp sensor staying in the cold range, this may not set a code and would cause a rich mixture, could cause some cat odor, another possiblity here, but less likely than the cat. A scan will reveal if the temp sensor is accurate.

I should add that I jumped the obd and its coming with with two codes lean exhaust and rich exhaust could this possibly be the o2 sensor????

[meistermind]

Could be this....or could be that!. Lets face it, you have a '91. Smart money is on the Catalytic Converter!!!

This is the one, go get it. It bolts right up to the existing pipe joint flanges (unless already modified):

http://www.partsamerica.com/ProductD...pe=248&ptset=A


Just Do It!!!!!!!!!!

[meistermind]

Originally Posted by meistermind

Could be this....or could be that!. Lets face it, you have a '91. Smart money is on the Catalytic Converter!!!

This is the one, go get it. It bolts right up to the existing pipe joint flanges (unless already modified):

http://www.partsamerica.com/ProductD...pe=248&ptset=A


Just Do It!!!!!!!!!!

OOPs!! Wrong Link. Here it is:

http://www.partsamerica.com/ProductD...pe=145&ptset=A