RE: DME Mixture Switch

["Bob Kegel" <bobkegel@xxxxxxxxxx>]

On Fri, 25 Jun 1999, at 12:30:16 EDT, BOBINYELM@domain.elided wrote"

>I remember reading somewhere (I thought it was the BMW Companion book,
but I
>cannot find it there) about a switch mounted in the Motronic control
box.
{SNIP}
>Is this a pot or a switch, and just what does it do? Anyone?

It's the Fuel Quality Switch. (Settings are sequential, turning the
switch clockwise from #1)
1. Stock
2. 3% increase in injector open time, no timing change
3. 3% decrease in injector open time, no timing change
4. 6% increase in injector open time, no timing change
5. 3% increase in injector open time, 2.78 degrees retard
6. 3% decrease in injector open time, 2.78 degrees retard
7. 6% increase in injector open time, 2.78 degrees retard

Having neither the expertise nor instruments to evaluate changes I have
not mucked with mine. YMMV

Bob Kegel
'70 2002
'85 635 CSi
BMW CCA #135175
BMW ACA Puget Sound Region

------------------------------