ECU pulse width calculations...?

[Tom Parker]

John Dammeyer <johnd at autoartisans.com> wrote:

>If it's a standard O2 sensor why not replace it with a pot that provides
>0..1.0V and set the output to 0.5V which is supposed to be 14:7:1.  Then,
>because the O2 is telling the ECU that the mixture is perfect it won't keep
>screwing around with the mixture pulse width and you can see the real result
>of your tuning.

I have little experiance in these things, but don't OEM controllers richen the
mixture until they see the O2 sensor make a "transition" from low to high, and
then they lean the mixture until the voltage goes back down.

Holding the O2 sensor voltage constant would have an unpredictable effect.
Possibly the computer would flag it as faulty and use some sort of backup
system.

--
Tom Parker - parkert at ihug.co.nz
           - http://www.geocities.com/MotorCity/Track/8381/