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Emissions help...High hydrocarbons and High NOX

This is a discussion on Emissions help...High hydrocarbons and High NOX within the General Help forums, part of the LSx Technical Help Section category; I need some real help.......I have 15 days to get my car to pass emissions. The car has brand new ...

  1. #1
    Junior Member Dreamnz28's Avatar
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    Emissions help...High hydrocarbons and High NOX

    I need some real help.......I have 15 days to get my car to pass emissions. The car has brand new cats and currently has 3 gallons of methanol mixed in with the fuel.


    Hydrocarbons (HC GPM) are reading 2.36 with a limit of 1.2

    NOx GPM 3.13 with a limit of 1.5


    My emissions are for Colorado.

    PLEASE HELP......I am Stressing out

  2. #2
    Member DaddySS's Avatar
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    You need to tell us about the modifications to your engine.

  3. #3
    cutting and welding mark21742's Avatar
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    hugger orange
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    sounds like your running strait alcohol.....it will settle to the bottom of the tank. the computer isn't setup to run flex fuel.
    I'd run a tank or two of good 93 octane through it and try to pass again with no mix

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