Re: O2 sensor readings

[Huw Powell <audi@mediaone.net>]

> > > warm, throttle closed, 1000-2000rpm: 0.7-0.8 
> > > warm, throttle closed, >2000rpm: 0 
> Thats decelerating (Graydon-I usually idle at 700-800). I'm thinking
> the change in mixture at 2000 rpm has something to do with the
> jerking, but what could be the cause?

makes sense.  at first you cut off the air, so it is rich.  then the
system reacts (was this a cis-e car?) via the potentiometer or idle
switch and cuts fuel, reverses actuator current, leans it out until it
hits idle rpms again.

>  I guess I should try it
> uphill to see whether I can build up to 0.7 at lower RPM.

this should only happen whent he WOT switch is "on", ie last 1/3 or so
of throttle rotation.  look at it under the hood, compare to accel pedal
position to see when it should happen.


> 
> BTW, I thought oxygen made voltage, so 0.7 would be lean?

like I said, I looked it up in the Bosch book real quick to get it the
right way round...

-- 
Huw Powell

http://www.humanspeakers.com/audi/

82 Audi Coupe; 84 4kq; 85 Coupe GT