RE:lumpy idling Milano Verde - UPDATE reply

[Antonio Rosciglione <ajr666@domain.elided>]

John,

We used a volmeter attached to the O2 sensor leads and watch the voltage
fluctuate around a half volt? I think cant remember, actual voltage but it was
within tolerance of what is called for. We did this from dead cold to fully
warm.  The O2 sensor is new too, but we wanted to check everything.  We did
test open loop but again, i dont remember numbers other than they were within
spec.

How do you set a base CO level?  I dont have any tool to actually check CO
levels or a manometer as such.

Thanks for the response and I will keep you posted.
Antonio
PS:My direct email to you bounced back so I posted to the digest instead.

John D. Fox wrote:

> Antonio - how did you set the CO level of the car at idle? Or,
> equivalently, how did you test the O2 sensor?
>
> What voltage do you see on the O2 sensor ( running closed loop) at idle -
> does the voltage go up and down with the idle speed variation? What is the
> open-loop O2 sensor voltage?
>
> I am wondering if your base CO setting is way off, and you are seeing the
> FI computer trying to hunt and set the idle mixture to the correct O2
> concentration - but it cannot, because the mixture is too far off. So it
> just keeps hunting and trying.
>
>                                                           John

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