Rotten egg smell. - SaabCentral Forums
*
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum


Go Back   SaabCentral Forums > Saab 9-3 SportSedan, Cabrio ('04+), Combi & 9-3X, 2003-2012 > 9-3 Sedan, Cabrio ('04+)/Combi & 9-3X Workshop

9-3 Sedan, Cabrio ('04+)/Combi & 9-3X Workshop 9-3 SportSedan, Convertible ('04+)/Combi & 9-3X , 2003 - 2012 Technical Forum

SaabCentral.com is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 12th January 2010
f1rlz's Avatar
f1rlz f1rlz is offline
Senior Member
 
Join Date: Jul 2009                                                
Location: Tulsa,OK USA
My Saabs: 2003 93 Linear Sedan
Posts: 164
Question Rotten egg smell.

It's been very cold here lately and I noticed the smell after I start my Saab, it goes away after the engine warms up.
Any ideas? Thanks.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12th January 2010
xp3's Avatar
xp3 xp3 is offline
Saab Crazy
 
Join Date: Nov 2009                                                
Location: Chicago, IL
My Saabs: '03 Saab 9-3 2.0t
Posts: 859
Default

Quote:
Originally Posted by f1rlz View Post
It's been very cold here lately and I noticed the smell after I start my Saab, it goes away after the engine warms up.
Any ideas? Thanks.
It might be a failing catalytic converter. However this is a result of something else going bad. Check for misfiring or blown head gasket.
__________________
Current mods: 14t swap w/ JZW tune, GS Strut Brace, Aero front lip, 9-5 Aero turbine wheels, diy AUX-IN (check out my for-sale-thread)
Coming soon: downpipe/exhaust, Aero body kit
Reply With Quote Quick reply to this message
  #3  
Old 12th January 2010
stamonkey's Avatar
stamonkey stamonkey is offline
Saab Lunatic
 
Join Date: May 2006                                                
Location: Ft. Collins, CO
My Saabs: 1988 C900 SPG
Posts: 1,919
Default

Its probably excess sulfur from your fuel that your catalytic converter doesn't catch until it gets a chance to warm up. Are you burning the good stuff?
Reply With Quote Quick reply to this message
  #4  
Old 12th January 2010
f1rlz's Avatar
f1rlz f1rlz is offline
Senior Member
 
Join Date: Jul 2009                                                
Location: Tulsa,OK USA
My Saabs: 2003 93 Linear Sedan
Posts: 164
Default

How do I check for blown head gasket?
Reply With Quote Quick reply to this message
  #5  
Old 12th January 2010
JonV JonV is offline
Saabista
 
Join Date: Mar 2004                                                
Location: Richmond, VA
My Saabs: 03 SE 5 Spd
Posts: 12,506
Default

The Cat is failing. No CEL?
Reply With Quote Quick reply to this message
  #6  
Old 12th January 2010
f1rlz's Avatar
f1rlz f1rlz is offline
Senior Member
 
Join Date: Jul 2009                                                
Location: Tulsa,OK USA
My Saabs: 2003 93 Linear Sedan
Posts: 164
Default

Lately I have been buying 10% ethanol gas. I bought some good gas (100%) today....
Reply With Quote Quick reply to this message
  #7  
Old 12th January 2010
xp3's Avatar
xp3 xp3 is offline
Saab Crazy
 
Join Date: Nov 2009                                                
Location: Chicago, IL
My Saabs: '03 Saab 9-3 2.0t
Posts: 859
Default

Quote:
Originally Posted by f1rlz View Post
How do I check for blown head gasket?
Any other symptoms?
rough idle, shaking/rattling, white smoke coming from exhaust, oil/coolant leaks?
__________________
Current mods: 14t swap w/ JZW tune, GS Strut Brace, Aero front lip, 9-5 Aero turbine wheels, diy AUX-IN (check out my for-sale-thread)
Coming soon: downpipe/exhaust, Aero body kit
Reply With Quote Quick reply to this message
  #8  
Old 12th January 2010
f1rlz's Avatar
f1rlz f1rlz is offline
Senior Member
 
Join Date: Jul 2009                                                
Location: Tulsa,OK USA
My Saabs: 2003 93 Linear Sedan
Posts: 164
Default

No CEL at all. I thought CAT's don't fail in Saabs...
Reply With Quote Quick reply to this message
  #9  
Old 12th January 2010
f1rlz's Avatar
f1rlz f1rlz is offline
Senior Member
 
Join Date: Jul 2009                                                
Location: Tulsa,OK USA
My Saabs: 2003 93 Linear Sedan
Posts: 164
Default

No white smoke. It is idling a little rougher it seems.
Reply With Quote Quick reply to this message
  #10  
Old 12th January 2010
f1rlz's Avatar
f1rlz f1rlz is offline
Senior Member
 
Join Date: Jul 2009                                                
Location: Tulsa,OK USA
My Saabs: 2003 93 Linear Sedan
Posts: 164
Default

I just remembered that my coolant level was low a few weeks ago it wasn't below 32 at the time, I topped it off and the "coolant level low" warning disappeared from the SID.
Let's assume the worst, if the head gasket is blown, what kind of repair cost am I looking at?
Thanks a lot!!
Reply With Quote Quick reply to this message
  #11  
Old 12th January 2010
stamonkey's Avatar
stamonkey stamonkey is offline
Saab Lunatic
 
Join Date: May 2006                                                
Location: Ft. Collins, CO
My Saabs: 1988 C900 SPG
Posts: 1,919
Default

Quote:
Originally Posted by f1rlz View Post
I just remembered that my coolant level was low a few weeks ago it wasn't below 32 at the time, I topped it off and the "coolant level low" warning disappeared from the SID.
Let's assume the worst, if the head gasket is blown, what kind of repair cost am I looking at?
Thanks a lot!!
A head gasket would be pricey (probably like $1k or so) but a blown head gasket won't give you the symptoms you describe. Does you car overheat? Do you have a milky substance in your overflow tank? Do you have a milky substance in your oil? Any smoke? These are signs of a head gasket failure.

I would put my money on poor fuel, an O2 sensor on its way out, or at worst a failing catalytic converter. The sulfur smell is a byproduct from the combustion cycle.
Reply With Quote Quick reply to this message
  #12  
Old 12th January 2010
JonV JonV is offline
Saabista
 
Join Date: Mar 2004                                                
Location: Richmond, VA
My Saabs: 03 SE 5 Spd
Posts: 12,506
Default

If your not blowing white Smoke, smelling the Sweet Coolant smell and your Oil is clean it's simply not your headgasket.
Reply With Quote Quick reply to this message
  #13  
Old 12th January 2010
JonV JonV is offline
Saabista
 
Join Date: Mar 2004                                                
Location: Richmond, VA
My Saabs: 03 SE 5 Spd
Posts: 12,506
Default

Quote:
Originally Posted by f1rlz View Post
Lately I have been buying 10% ethanol gas. I bought some good gas (100%) today....
That has nothing to do with it.
Reply With Quote Quick reply to this message
  #14  
Old 13th January 2010
JBob's Avatar
JBob JBob is offline
Saab Lunatic
 
Join Date: Feb 2006                                                
Location: West Yorkshire, UK
My Saabs: 2003 9-3SS 2.0t Vector, Steel Grey (OOW)
Posts: 1,089
Default

Quote:
Originally Posted by JonV View Post
The Cat is failing. No CEL?
Not necessarily. The rotten egg smell is caused when there is insufficient oxygen in the cat to reduce the sulphur in the exhaust gases - the result is hydrogen sulphide.

This can be caused by many things - a failing (plugged) cat, a failed air pump, over fuelling, excessively hot cat or cold cat. For example, you can often smell it when cars have to wade through deep water, dowsing the hot cat in cold water...

Strangely, the rotten egg smell can mean your cat is failing, or that it is working! This smell is common on some cars (1990's Subarus seem particularly prone to it), probably due to less than perfect fuelling. New cars are also often prone to it too.

The CEL will only illuminate if the downstream oxygen sensor signal conflicts with the upstream one.

If it only occurs when cold (especially if the car hasn't been used much recently) then I wouldn't worry about it. Take it for a long run and get that cat nice and warm! I'd only be concerned if it failed an emissions test.
Reply With Quote Quick reply to this message
  #15  
Old 13th January 2010
Piper of Rose Piper of Rose is offline
Senior Member
 
Join Date: Sep 2006                                                
Location: usa
My Saabs: 2004 9-3 Linear
Posts: 192
Default

I think its caused by GM
Reply With Quote Quick reply to this message
  #16  
Old 13th January 2010
Diggs's Avatar
Diggs Diggs is offline
Super Moderator
 
Join Date: Oct 2003                                                
Location: Shawnee, KS
My Saabs: 2003 9³SS Linear
Posts: 7,135
Default

Quote:
Originally Posted by Piper of Rose View Post
I think its caused by GM
Ha! Nice one.

I've had on again off again rotten egg smell since I bought the car new. No blown head gaskets or failed cats here.
Reply With Quote Quick reply to this message
  #17  
Old 13th January 2010
stamonkey's Avatar
stamonkey stamonkey is offline
Saab Lunatic
 
Join Date: May 2006                                                
Location: Ft. Collins, CO
My Saabs: 1988 C900 SPG
Posts: 1,919
Default

Quote:
Originally Posted by f1rlz View Post
Lately I have been buying 10% ethanol gas. I bought some good gas (100%) today....
Quote:
Originally Posted by JonV View Post
That has nothing to do with it.

Yes it does, poor quality fuel with a higher sulfur content allows for more hydrogen sulfide to be produced.

Unless Jon, your talking about the 10% ethanol blend, then that wouldn't matter.
Reply With Quote Quick reply to this message
  #18  
Old 13th January 2010
JonV JonV is offline
Saabista
 
Join Date: Mar 2004                                                
Location: Richmond, VA
My Saabs: 03 SE 5 Spd
Posts: 12,506
Default

Quote:
Originally Posted by stamonkey View Post
Yes it does, poor quality fuel with a higher sulfur content allows for more hydrogen sulfide to be produced.

Unless Jon, your talking about the 10% ethanol blend, then that wouldn't matter.
Yes I'm talking the 10%..... but this sounds like more Than a "one Tank" of bad gas Issue..... just get an emissions test and see what the result is. If it were running rich you smell the gas....
Reply With Quote Quick reply to this message
  #19  
Old 13th January 2010
jlrdrony's Avatar
jlrdrony jlrdrony is offline
Saab Lunatic
 
Join Date: Jun 2008                                                
Location: SPAIN
My Saabs: 2007 93 SS-AERO V6 MT6
Posts: 1,851
Default

The rotten egg smell is caused due to there is water pollution in the wiper tank.

Actions to be taken:
-Vacuum the water wiper tank with a hose. clean it as much as possible.
-fill up top the wiper tank with a new water.
-replace the air cabin filter with a new one.
-clean the firewall area and the drain grommet.
__________________

Reply With Quote Quick reply to this message
  #20  
Old 13th January 2010
f1rlz's Avatar
f1rlz f1rlz is offline
Senior Member
 
Join Date: Jul 2009                                                
Location: Tulsa,OK USA
My Saabs: 2003 93 Linear Sedan
Posts: 164
Default

There is no emissions test in Oklahoma.
I checked my oil, no water in it. I checked my coolant- no oil in it, just a little low. Is that normal, coolant evaporates over time?
I recently put a new air filter and cabin air filter in, so I think those are ok.
No white smoke at all. Engine is not overheating at all.
I always buy 91 octane gas at Shell stations (only in the last month I have been buying 91 octane with 10% ethanol at other Shell stattion since I moved) but I will go out of my way to buy 100% gas again.
I didn't smell it today....

Thanks for all the replies.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:53 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

top of page | sitemap | email us



copyright © 2003 - 2011 saabcentral.com, All rights reserved http://www.whiter.co.uk - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.