Why no feedback under WOT?

[Thor Johnson]

>From studying my 300ZX Manual (and looking at the ECM tuning program), I 
understand that the ECM runs open loop in WOT situations.  Why?
Is it because the ECM program uses the O2 sensors for MPG reasons only, 
or do the physics change under WOT?

Thanks!

                Thor Johnson
       johnsont at falcon.mercer.peachnet.edu
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