Proper Mixture.

[atsakiri at ford.com]

> > from what I've gathered, this is used to adjust the injector pulse width
> > slightly until the mix is a little too far the other way.  So, the A/F mix
> > hovers close to stoich but never really stays on stoich too long.  
> 
> I wonder if this has changed in the last few years? when I tune my Z28,
> I tune it by adjusting fuel pressure until I get about 890-920 mV from
> the O2 sensors. This corresponds to about 13:1 A/F ratio. 

I don't think this has changed.  At least two factors are 1) the 
drift of the sensor's characteristics over time, and 2) the sensor-
to-sensor variation.  I think most fuel controllers are of the 
bang-bang variety.  (That's not to say that something else won't
work!)


Anthony Tsakiris

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The opinions expressed are my own and not necessarily those of my employer.