(RE) CIS-E idle/mixture problems

["Dave Ewing" <rabbit16v@prodigy.net>]

That might be a good place to start.  What I have recently learned is that a
nickel is the difference between basic and zero measurements.  When setting
the A/F mixture, remember to use 10 mA as your setting point and it more
than likely will be fluctuating between 9 and 11.  Lambda sensing is between
0 and 20 so 10 is where you want to be.  HTH!!

Dave

P.S.  Checking duty cycle at the idle air valve is used to check the idle
when you ground one side.  The outside prongs are ground pulses sent from
the computer and the center is power so you ground one of the outside prongs
and measure duty cycle on the other.  This will tell you either how long it
is open or closed (according to the computer).  Since you are grounding one
side, it will be locked closed shutting off that air path so the idle can be
adjusted correctly.  Then you check the DPR mixture, then the idle, and so
forth until they come out correct.  If you have any questions, LMK!!


> Hey I have the books. I'm thinking K-basic, and K-zero may be way out of
> wack. K-Zero is the position of the  air flow sensorplate at dead drop
> in the "cylinder", and k-basic is the point at which it rests when you
> pull the plate up and it is at the top of the vertical part of the air
> funnel, and the lever just touches the control plunger. I think if I
> maybe adjusted my air flow sensor so that these two base values were
> correct, then set the mixture via the DPR to about 3-5ma the car would
> haul ass again and run great. Does this sound right guys?
> -Gary Huff
>
>
> Christian Els wrote:
> >
> > Almost the right answer.
> >
> > The value 10 is for CIS-E 8v's, a 16V should average 5 to meet spec, 3
for
> > better performance (and slightly worse mileage, emissions).
> >
> > Christian
> > 87 16V
> >
> > ----- Original Message -----
> > From: "Dave Ewing" <rabbit16v@prodigy.net>
> > To: "Scirocco List" <Scirocco-l@scirocco.org>
> > Sent: Friday, 16 March, 2001 11:46
> > Subject: Re: (16v) CIS-E idle/mixture problems.
> >
> > > Nope, wrong answer.
> > >
> > > You DON'T have to have a gas analyzer to accurately set the air/fuel
> > > mixture.
> > >  On a KE Jetronic system if you set the integrator value to 10
> > (fluctuating
> > > between 9 and 11) then your stoichiometric value should be exactly
14.7:1
> > at
> > > 3000 rpm.  The integrator value is the reading from the
electromagnetic
> > > actuator or the differential pressure regulator.  You can do this by
> > making
> > > a
> > > test connector (just like it shows in the bentley) and using your
> > multimeter
> > > on the duty cycle setting.  It is actually really simple but make sure
> > that
> > > your idle and timing are set first.  You should also make sure that
the
> > > primary and secondary ignition is in good shape along with fuel
pressures
> > > (lower pressure and system pressure--differential being about .4 bar
> > > difference (system pressure-lower chamber pressure=differential
pressure,
> > > also showed in the bentley)).  If you plan on working on your own car,
you
> > > should have at least a bentley, and maybe a F.I. book (Bosch makes an
> > > excellent book for this) and read them!!!  HTH!!
> > >
> > > Dave
> > >
> > >
> > > --
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> > >
> >
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