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Thread: Failed emissions test, need help with diagnosis

  1. #1
    Mitsu booster
    Join Date
    Jul 2020
    Location
    Meridian, ID
    Posts
    3

    Failed emissions test, need help with diagnosis

    So recently, I took in my 86 SC for an emissions test, and it failed. The guy running the test said it was running rich, and I had been smelling fuel intermittently before.

    2500 rpm Standard Test
    CO% 1.20 6.06 Fail
    HC (PPM) 220 206 Pass
    Dilution CO+CO2% 6.00 16.57

    Idle test Standard Test
    CO% 1.20 0.77 Pass
    HC (PPM) 220 144 Pass
    Dilution CO+CO2% 6.00 14.37

    Any suggestions? I'm new to fuel injection, and I'd rather get it right the first time.

  2. #2
    boostaholic
    Join Date
    Feb 2012
    Location
    socal
    Posts
    1,241

    Re: Failed emissions test, need help with diagnosis

    Yep looks like you are too rich. o2 sensor ok?
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    MinivanRider

  3. #3
    Mitsu booster
    Join Date
    Jul 2020
    Location
    Meridian, ID
    Posts
    3

    Re: Failed emissions test, need help with diagnosis

    It turns out I have an extra 02 sensor, so I'll install that and hope I pass this time.

  4. #4
    turbo addict
    Join Date
    Dec 2005
    Location
    Spokane, Wa
    Posts
    9,046

    Re: Failed emissions test, need help with diagnosis

    They have emisions test's in Meridian? Even Dictator Inslee got rid of that in Wa state. Though I did like going just to see how much better my car got each time after modding it.

    Anyway, Any codes? Since you're new to FI you probably don't know how to check them.
    www.minimopar.net

  5. #5
    Mitsu booster
    Join Date
    Jul 2020
    Location
    Meridian, ID
    Posts
    3

    Re: Failed emissions test, need help with diagnosis

    They only have two counties in Idaho with emissions, and I'm still living with family for a while. I did check the codes before I went, it only came up with the speed sensor code.

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