Treser Audi

[Phil Payne]

> > Dogs anyway.  Used an upside-down MB metering head.  I've never been
able to
> > figure out how it worked.  In the classic CIS system, the paddle rises
or
> > falls in a shaped cone, the shape of the cone establishing the exact
fuel
> > ration at every point.
> >
> > In the Treser 200 I saw, the paddle moves out of the cone in the
opposite
> > direction.  Couldn't get it to run properly - acceleration just shy of
the
> > WoT switch position always went over-rich - would have killed a cat in
no
> > time.
>
> What you refer to is the "downdraft" style Bosch K-Jetronic air flow
> sensor.  It was primarily used by Mercedes, usually located under the
> large air cleaner cover in the middle of their V8 engines (which makes it
> look like a carbureted car.  There is nothing inherently wrong with
> the downdraft version v. the "updraft" style that is used on VWs,
> Audis, Volvos and Saabs.  The fuel distributor rod rides on the
> opposite side of the fulcrum, and the sensor plate is in an inverted
> cone funnel, but otherwise works the same.  The sensor plate is
> counterweighted such that the fuel system's control pressure is what keeps
> the plate from overshooting.

Read it again Ti - this time much more carefully.  My second sentence refers
to 'rises or falls' - that includes the "downdraft" you describe.  This is
DIFFERENT - the cone is upright (as per Audi) but the paddle moves DOWN -
OUT of the cone.

I know a little bit about CIS.