sulpher odor
Der Postmeister
Joined: Sep 2006
Posts: 6,859
Likes: 560
From: Long Beach, Calimexiforia
As of july, last year. They're not too picky about the Cat, as long as it passes the test. They have cow's about air intake & other engine modes though.
Senior User
Joined: Jun 2010
Posts: 141
Likes: 0
Stepping in late to the conversation, but rotten egg smell is almost always a sign of a bad battery. More specifically, a bad cell in a battery. It will start just fine for a bit, but it is only getting "top" charged by the alternator. Vehicles with bad battery conditions can sometimes run like turds as well.
You might have to stick your nose by the tailpipe and see if the smell is coming from there, but I would also open the hood and sniff the battery.
Hydrogen Sulfide is the bad egg smell. It can be caused by both a bad battery and a cat. But usually the cat isn't "bad". The Hydrogen Sulfide smell can be a by-product of a cat doing it's job BUT change fuel stations. Give it a few like (5) full tank fulls before you start changing parts.
You might have to stick your nose by the tailpipe and see if the smell is coming from there, but I would also open the hood and sniff the battery.
Hydrogen Sulfide is the bad egg smell. It can be caused by both a bad battery and a cat. But usually the cat isn't "bad". The Hydrogen Sulfide smell can be a by-product of a cat doing it's job BUT change fuel stations. Give it a few like (5) full tank fulls before you start changing parts.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
Take a look at items F&G. I read that to mean if the factory used a two converter system it has to be replace with two converters not a single 3-way. But if you look in the Application Lookup chart the direct replacement is indeed a 1-for-2 swap. Go figure!
Der Postmeister
Joined: Sep 2006
Posts: 6,859
Likes: 560
From: Long Beach, Calimexiforia
That is really interesting. I have read some of the info at Magnaflow's website about California converters: MagnaFlow Exhaust - Catalytic Converters
Take a look at items F&G. I read that to mean if the factory used a two converter system it has to be replace with two converters not a single 3-way. But if you look in the Application Lookup chart the direct replacement is indeed a 1-for-2 swap. Go figure!
Take a look at items F&G. I read that to mean if the factory used a two converter system it has to be replace with two converters not a single 3-way. But if you look in the Application Lookup chart the direct replacement is indeed a 1-for-2 swap. Go figure!
Posting Guru
Joined: Jun 2003
Posts: 2,314
Likes: 0
From: southwest michigan
You might have to stick your nose by the tailpipe and see if the smell is coming from there, but I would also open the hood and sniff the battery.
Hydrogen Sulfide is the bad egg smell. It can be caused by both a bad battery and a cat. But usually the cat isn't "bad". The Hydrogen Sulfide smell can be a by-product of a cat doing it's job BUT change fuel stations. Give it a few like (5) full tank fulls before you start changing parts.
Hydrogen Sulfide is the bad egg smell. It can be caused by both a bad battery and a cat. But usually the cat isn't "bad". The Hydrogen Sulfide smell can be a by-product of a cat doing it's job BUT change fuel stations. Give it a few like (5) full tank fulls before you start changing parts.
Either the catalyst has failed, or there is not enough oxygen getting to the cat, due to running over-rich or a failed air pump. If it is the air pump, you will only smell it after short trips.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
The '97 Mustang GT I just sold came with 6 cats from the factory. I replaced those about 4 years ago with a Magnaflow X-pipe, mufflers and tailpipes. Awesome sound and picked up some ponies too.
Posting Guru
Joined: Oct 2009
Posts: 1,431
Likes: 1
From: Ohio
Hydrogen Sulfide means that the oxidizing end of your catalyst is not working, and the reduction end is reducing the sulfur from your fuel to H2S.
Either the catalyst has failed, or there is not enough oxygen getting to the cat, due to running over-rich or a failed air pump. If it is the air pump, you will only smell it after short trips.
Either the catalyst has failed, or there is not enough oxygen getting to the cat, due to running over-rich or a failed air pump. If it is the air pump, you will only smell it after short trips.
We can, and are willing to help you out here, but you have to listen to the knowledge many on this board are giving you.
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