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A/F Conversion

This is a discussion on A/F Conversion within the General Help forums, part of the LSx Technical Help Section category; As noted in other threads, I utilize a Hypertech to read the sensor data and want to ensure that I ...

  1. #1
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    pajeff02's Avatar
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    A/F Conversion

    As noted in other threads, I utilize a Hypertech to read the sensor data and want to ensure that I am interpreting it correctly. My understanding is that the upstream O2 sensors should read around 450 millivolts (mV) when it reads a 14.7:1 A/F.

    If the mV is greater than 450, this indicates a richer A/F; and, if it is less than 450 mV, then the mixture is leaner. Just checking to see if this is correct and if there is a conversion formula to obtain an approximation of A/F.

    I am not having any problems and do not want to invest in a wideband aftermarket unit at this time. Just trying to use what I have to keep tabs on what is going on under the hood...

  2. #2
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    correct
    1000mV is rich
    10mV is lean

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