my Audi A4 is running Rich at idle

Discussion in 'General Discussion' started by Hunter, Oct 20, 2017.

  1. Hunter
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    Hunter The 47 Ronin

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    I replaced MAF, Coils and Spark Plugs = still same shit :(

    1) High Pressure Fuel Pump

    2) PCV, I saw wet oil/fuel on one of its corner

    3) O2 sensor

    Take your pick and Help me guys!! @tuc0
     
  2. el jorge loco
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    el jorge loco Staff Member Moderator

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    It's probably the O2 sensor, especially since you already replaced the MAF.. though I hope it's not Powertrain Control Module
     
  3. Ghonzo
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    Ghonzo The 47 Ronin

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    Check your O2 Sensor first but have you checked your AFR to see what its reading on idle? If its reading low it might be your PCM dumping fuels. Have you noticed any blue smoke blow by?
     
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  4. A-Rich
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    A-Rich The 47 Ronin

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    I hadn't heard the term "running Rich." I thought you were talking about me.
     
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  5. tuc0
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    tuc0 Well-Known Member

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  6. Hunter
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    Hunter The 47 Ronin

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    Thanks guys!

    O2 sensors will be next...Since I saw the leak at the PCV, I have ordered one because I have to fix that leak anyway.

    I have a reader and it said my O2 sensors are "OK" on its screen.
     
  7. Hunter
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    Hunter The 47 Ronin

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    Don't buy Audi please :(
     
  8. el jorge loco
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    el jorge loco Staff Member Moderator

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    Don't buy European cars in general.
     
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  9. Ghonzo
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    Ghonzo The 47 Ronin

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    Unless you got deep pockets XD
     
  10. el jorge loco
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    el jorge loco Staff Member Moderator

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    BMW = Big Money Waster; Blow My Wallet
     

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