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Strong odor from the exhaust

Discussion in 'Technical Chat' started by charliedelta, Mar 7, 2010.

  1. Mar 7, 2010 at 8:06 PM
    #1
    charliedelta

    charliedelta [OP] charliedelta

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    I have a 09 Tacoma and park it in a garage. When I start the vehicle in the morning and the engine is cold there is a strange odor that comes out of the exhaust. I can't describe it but it is a strong odor that I have never smelled before. I have a roommate who has smelled it and she said the same thing. It only happens when the engine is cold. After the engine warms up I don't smell it anymore. I called the Toyota dealer and they told me to change the gas I put in the truck. I was using 76 and switched to Shell. Still happens. Any suggestions to what might be causing what i'm smelling?:eek:
     
  2. Mar 7, 2010 at 8:08 PM
    #2
    Cars0n`

    Cars0n` Well-Known Member

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    i wonder if its just a weird mixture of exhaust and condensation?

    ive never smelled a weird smell outta my exhaust :S
     
  3. Mar 7, 2010 at 8:11 PM
    #3
    Max-4_Yota

    Max-4_Yota The Welfare Cadilac

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    have you put any different exhaust on the truck?
     
  4. Mar 7, 2010 at 8:12 PM
    #4
    ttylerr

    ttylerr Well-Known Member

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    my truck does this too on cold start-ups, smells like its running really rich or something. i have the 2.7l engine but i think you're experiencing the same smell as i am. i think it maybe the computer telling the engine to run rich to reach operating temp faster. just a guess
     
  5. Mar 7, 2010 at 8:24 PM
    #5
    topgun155

    topgun155 Well-Known Member

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    Is it a petrolium odor like gas or is it just plain stink.
     
  6. Mar 7, 2010 at 11:16 PM
    #6
    charliedelta

    charliedelta [OP] charliedelta

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    I have not changed my exhaust system. It's the one that came with the truck. I am running super unleaded gas. I thought that would make a difference as far as engine performance. My roommate says it's smells like wet paint.

    Mike
     
  7. Mar 7, 2010 at 11:38 PM
    #7
    Kyouto42

    Kyouto42 Iron Beard

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    Wet paint smell? That's really new lol... even with my straight 3" on a sbc 327... it smells like, well exhaust (running way to rich too).

    I wonder if you got something in the exhaust...
     
  8. Mar 8, 2010 at 7:03 AM
    #8
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Switch to 87 and see if it goes away.
     
  9. Mar 8, 2010 at 7:04 AM
    #9
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    The engine will run rich when it's cold. Being new has nothing to do with it (running rich).
     
  10. Mar 8, 2010 at 7:11 AM
    #10
    Kyouto42

    Kyouto42 Iron Beard

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    How would switching to a lower octane help at all?
     
  11. Mar 8, 2010 at 7:15 AM
    #11
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    No clue, just a shot in the dark. It's just a simple diagnostic tool to eliminate one thing to see if the "problem" goes away. There could be different additives in the high test versus the lowest test.
     
  12. Mar 8, 2010 at 7:23 AM
    #12
    Danosabre

    Danosabre Well-Known Member

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    Could be some of the additives they put in the gas. Try some Seafoam to clean it out.
     
  13. Mar 8, 2010 at 7:27 AM
    #13
    Beefed Taco

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    Catalytic converter is my guess. I have a new one on a old truck and this sucker stinks worse than any other one I've ever smelled. Bummer because I like to drive with the rear window open. I don't think there's anything you can do other than drive it till it doesn't smell anymore. It doesn't help that you have 4 of the damn things on there.
     
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