ox sensor on sequential efi,high overlap cam....

[Espen Hilde]

I have a question that I have been thinking about lately.
In a engine with high overlap cam and sequential efi,how to measure air
fuel ratio?
At certain points in the rpm scale the engine is scavenging air right
trough the engine.(I presume)
At overlap.The sequential efi will not inject fuel to this amount of
air.(not supposed to....)
The result as I see it,is that air is pulled trough to the exhaust
system.The ox sensor (if it sensors 02)
will say this is a lean condition.
Am I worthy of a coned shaped hat?
Espen Hilde