[Update] CIS-E Troubleshooting

[vwtype53@yahoo.com (Benjamin Harder)]

Ok, after posting I have realized several things... first of all,
if the car was truely running in open loop mode then the reading I
was getting from the DPR is not making sense, since 20mA is pretty
lean.  Anyhow, I tried turning the mixture screw more than just 
small amounts to see what would happen, and sure enough, with
a good full turn to the right (rich), the DPR current reading came
back down to a fluctuating, lower value...
so this is one step in the right direction at least!

Now this leads to my other post about the idle... as I richen the mixture
the idle gets higher, but the idle screw is in all the way!  And timing
is set to what seems to be correct at +6 degrees.  hmmm... always something!

Ben

PS...when the idle mixture is set really lean, the car has quite a wicked
sounding idle... like big cams are installed.  ;)
Now that I set the mixture it is very smooth.



--- Benjamin Harder <vwtype53@yahoo.com> wrote:
>  Well, my 16v mk1 is coming along, but I still can't figure out why
> it continues to run in Open Loop mode...
> 
>  First, I checked the DPR current and found it to read a constant 20.4 mA.
> This led me to check the O2 sensor, which did appear to be bad...
> so I replaced the sensor.  Checked DPR again, and still read a constant
> reading.  Checked the O2 sensor directly and it was giving a good signal...
>  Next I checked most of the inputs to the O2 "Jetronic" box... everything
> seemed normal (coolant temp sensor fine, and both idle and full throttle
> switches good).  I then swapped boxes with my '86 16v (which I know is good)
> and the mk1 STILL showed a constant value around 20 mA for DPR current.
> 
> There must be a bad signal somewhere that is causing CIS-E to go directly
> to the open loop mode... what could it be?
> 
> I'm just not sure what else to check... any thoughts would be great!
> 
> =====
> Benjamin Harder
> 86 Scirocco 16v
> 80 Scirocco 16v
> 93 Passat GLX
> 
> http://www.geocities.com/vwtype53/
> 


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