O2 Sensor current?

[AL8001 at aol.com]

In a message dated 99-03-23 10:40:34 EST, you write:

>The car is a 85 Cutlass, CCC, 77 Olds 350.  The AIR and Cat have been removed
>(reason
>I am trying to richen).  The car runs pretty well.  But when hot there is a
>nasty
>part throttle ping, light throttle, when at WOT or heavy throttle, or at very
>light
>throttle, no problem.  I have been told that if the AIR system is removed
>this will
>cause it to be lean, as the O2 is expecting a certain amount of air to be
>present, so
>it would lean it out then.
>
>

>From what I remember,  these cars had tons of spark advance at light ( cruse
speeds) throttle.  The egr may be opening, but are you getting enough flow?
These cars use a exhause backpressure sensing EGR, pulling the cat would
affect operation since the BP sensor trims EGR flow.  

Harold