Very basic newbie question about A.I.R. pumps

[Len Sabatine]

     Careful investigation will reveal that A.I.R. s function per duty 
cycles. Main
     strategy is to make the  CAT light quicker. Manual and Auto duty cycles
     are different per engine , vehicle profile. Not all profiles have the 
A.I.R.
     installed , which is defined by the emission package and calibration.
     Typically emissions packages are defined , NA5 , NM8 , Export , etc.
     Many Export emissions packages also run leaded fuel , thus CL and O2
     are not functional. Depending which state you reside in , visual 
inspection
     of emission HW may be in place , removal of the components may cause
     you to fail the vehicle inspection program in place. Properly working 
A.I.R.
     system is not a serious loss in performance , as other areas in the system
     can yield more improvement in performance.
     Len

>Having just bought a smog pump equipped EFI vehicle, I began to wonder
>what effect the pump has on the ECM's calibration.
>
>It would seem to me that the air added to the exhaust stream would cause
>the O2 sensor to read falsely lean.  The ECM would compensate for this
>with a richer-than-normal fuel table, I would think.  The result of
>removing the pump, then, would be a rich-running motor and BLMs probably
>going haywire to boot.  Is this an accurate assumption?
>
>Are AIR pumps typically omitted on vehicles exported outside the USA?  If
>so, would an export-calibration be a good starting point for a Federal
>motor w/ the pump removed?
>
>The vehicle in question is a '92 S-10 pickup, 2.8L V-6, 2wd, 5-speed, by
>the way.
>
>Kevin
>
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