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Thread: Failed Emissions? Check here.

  1. Join Date
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    Elizabeth
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    Failed Emissions? Check here.

    So you failed emissions.

    Look at this chart to help figure out why.


    Simple things to check.
    1. Boost leaks. -High HC
    2. Fuel trims. -High HC, high Nox
    3. Plugs and wires. -Misfire will cause High Hc
    4. Base timing. -To much advance, high Nox

    -Seth

    You should be able to pass emissions with a working catalytic converter and a properly tuned car. I run 950cc injectors and passed without changing anything on my car other then putting my highflow cat on.
    -Seth

    2007 - 11.671 @ 125.34 50trim, 100shot, 110 octane
    2009 - 11.283 @ 126.86 SC6152e (131.11 best trap), only boost

    The Pictures
    Other forum screen names; awd1990dsm

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    Nice, that should help with all the emission threads I've seen. This should be a sticky.

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    Nice find and I agree, a properly tuned DSM (regardless of mods) should be able to pass either a tail pipe test or the IM240 roller test.

    Hal
    - 758/636 uncorrected @ English Racing, Nov 2011

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    Thanks for the graph. Sticky this hal if you haven't already.

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    Is there a e85 sticky? I failed emissions and need help. Anyone in the Westminster area availible to help? thank you-Rich

  6. Join Date
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    E85 will be similar. Your HC should be considerably lower then on gas though.

    What were your numbers?
    -Seth

    2007 - 11.671 @ 125.34 50trim, 100shot, 110 octane
    2009 - 11.283 @ 126.86 SC6152e (131.11 best trap), only boost

    The Pictures
    Other forum screen names; awd1990dsm

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    My co and hc were both twice the limit. I'm running 780 pte and dsmlink v2.5. I'm still learning the software.
    Thanks rich

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    My co and hc were both twice the limit. I'm running 780 pte and dsmlink v2.5. I'm still learning the software.
    Thanks rich

  9. Join Date
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    Sounds like your global is is set to low and you are running pretty rich.

    If you dont have a wideband for tuning then you need to get it to a shop and get it dyno tuned.
    -Seth

    2007 - 11.671 @ 125.34 50trim, 100shot, 110 octane
    2009 - 11.283 @ 126.86 SC6152e (131.11 best trap), only boost

    The Pictures
    Other forum screen names; awd1990dsm

  10. Join Date
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    I do have a wideband wired into the ecu as the r
    ear o2 to have the wb control fuel.

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