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Frost Tune & Illinois Emissions Test?

This is a discussion on Frost Tune & Illinois Emissions Test? within the Computer & Tuning forums, part of the LSx Technical Help Section category; I have a 1999 Z28 throwing codes for Rear O2, EGR & AIR, Car runs GREAT! I understand that the ...

  1. #1
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    1999 Z28

    Smile Frost Tune & Illinois Emissions Test?

    I have a 1999 Z28 throwing codes for Rear O2, EGR & AIR, Car runs GREAT! I understand that the Frost Mail Order Tune turns these items off. Does anyone know if I would still pass the Illinois emissions test with those points turned off? Just wondering before I order it. Thanks Much!

  2. #2
    Moderator 35th-ANV-SS's Avatar
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    02 35th LE Camaro SS

    I passed in IN with mine turned off and the AIR system deleted. As long as the PCM is still receiving the correct signals (which it would with a tune for deleting the rear O2's), you should be fine. I don't think IL does a visual inspection.
    It's on jackstands.

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