CIS theory ?

[Ameer Antar]

go to p. 25.28. The spec is 80% w/ a temp sensor below 68 degF.

-ameer


At 12:38 PM 11/1/00, you wrote:
>Is this information available in Bentley manual? I could not find it.
>
>Orin Eman wrote:
> >
> > > 1. open loop occurs when the engine is cold, unless your O2 sensor is
> > > heated [3-wire], and when the WOT switch closes. At WOT the ECU puts 
> out a
> > > fixed, pre-determined duty cycle, about 85% I think, but it should be in
> > > Bentley. The ECU ignores the O2 sensor input, and keeps it at 85%, 
> giving a
> >
> > 65 to 70% usually, depending on RPM.  Boost over a certain value is
> > also treated as WOT for this purpose, regardless of the WOT switch.
> > Higher values of duty cycle (in the 80% range) occur at startup and
> > during warmup.
> >
> > > rich mixture for maximum power. I don't know if the ecu is open or closed
> > > loop when the idle switch is closed, though.
> >
> > Closed loop if the engine is warm enough.
> >
> > Orin.