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Thread: Running Rich?

  1. #1

    Default Running Rich?

    Every time i get out of my car it smells like un-burn't fuel. Or whenI have it sittin in the shop standing 10 feet away you smell the same thing.
    I'm not sure if it has something to do with the aftermarket exhaust or just runnin to rich. On the emissions tester NOx is high so I'm thinkin posible EGR.
    Anybody have any other thoughts?
    Thanks -Wes-
    1991 Mazda Miata....Bone Stock!
    2004 Ford Ranger....Small Cosmetic Updates

  2. #2

    Default

    Jump 10 and GND to see if you are throwing any codes. Do you have an exhaust leak? Fuel leak? Has the Fuel Filter been changed? Maybe a bad o2 sensor.
    ...and across the line.

    1996 Mazda Miata - R-Package (Eve-L)
    2012 Mazda CX-9 - Grand Touring (Dory)




  3. #3

    Default

    It was an O2 sensor for me when I noticed the same thing.
    I live where even the coyotes won't go...

  4. #4

    Default

    Quote Originally Posted by Tim the Teacher View Post
    It was an O2 sensor for me when I noticed the same thing.
    You're O2 sensor was already defective on your car?
    ...and across the line.

    1996 Mazda Miata - R-Package (Eve-L)
    2012 Mazda CX-9 - Grand Touring (Dory)




  5. #5
    Banned
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    Default

    Do O2 sensors go bad and not throw a code? I noticed mine directly after replacing to full race exhaust and header. I need to take the test pipe off just to quiet it down a bit. I am running richer due to the great flow of exhaust. Have spares waiting to go in right before inspection, but no codes alerting problem.

  6. #6
    MME Goodwill Ambassador onething's Avatar
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    Default

    Quote Originally Posted by Machismo View Post
    I need to take the test pipe off just to quiet it down a bit.
    Yes you do. You were the loudest competitor at the last two events I attended
    Bidden or not bidden, God is present
    "Up until the moment of impact, I was still having fun." Bob J. Hall San Francisco Region



  7. #7
    Banned
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    Default

    Yep, going back to old cat instead of test pipe. The extra 3 horses isn't worth the attention.

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