O2 Sensor Open/Close Loop

[Doug Robson]

Robert McElroy wrote:
> 
>         Well, I have been listening for awhile, and have read many of the previous posts about O2 sensors, so I'll add my opinion as long as you remember it is worth only as much as you paid for it.
> 
> 
> 
>         The reasoning is that most street engines are at idle and part-throttle for the overwhelming majority of their operation.  Therefore, cleaning up the part-throttle and idle emissions and improving the part-throttle gas mileage would yield the greatest benefit.
> 
> My ECM is in closed loop mode at idle and part throttle. At wide open
> throttle is goes into open loop mode ( it stops reading the O2 sensor ).
> 
> WHY?
> 
> Mark Mason.


This is true most are narrow unless you buy the motorsprt version for
350 AUD which does .6 to 1,2 lambda
that i use in my race car Autronic. Motec uses same


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