Late model 1997-2001 Corvette or Camaro Firebird Air Fuel Ratio's

[Len Sabatine]

     A for instance is AutoTap Scanner which will display-save any parameters
     that're available from a spec data stream . There's also AT View SW which
     allows graphing of the acquired logs. Delivered Torque , HP , Fuel
     consumed  and Airflow are among the data list parameters as well.
     There's multiple page data lists that can be setup in OBD2 Scan Tools.
     A number of them allow clearing Trouble codes and some of the more
     powerful SW also clears "Freeze Frame" data too.
     BTW , Commanded AFR  is just that , Commanded.
     Len

>I have a friend who is asking for help.  Below is the text of his question.
>I don't know if there is a "Commanded AFR" listed in the data stream for the
>late
>model pcm's. (Not that it's always accurate anyway).
>Mark
>
>
>Is there a way to calculate the air fuel ratio on a LS1
>using functions like MAF readings, , Injector pulse with on time ?
>
>I need a formula in my excel template so that when I am importing PCM traces
>I can tell
>what the AFR is.
>
>I thought since I know what the MAF is ( converting to lb/hour) and injector
>sixe ( 38 lbs)
>that I could do the math for AFR but I am missing something and not even
>code to a valid
>AFR   ???
>
>
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