CIS-E3

[Huw Powell]

> That is correct, but it can do 2 things however, based on knock and
> temp.  The ECU has within it 2 ignition maps, one for premium fuel
> and one for standard fuel.  Everytime you start the car it defaults
> to the prem. fuel map (based on the temp sensor input and ignition
> restart).  If the knock sensor registers what it considers to be
> excessive knock (or repeated retard adjustments within a certain
> amount of time), it will kick back to the regular fuel map which is
> more retarded.

That's the first definitive description of these "maps" I have heard - I
don't recall seeing it in the Probst book, but maybe I was skimming.
Where can I go to dig into the details of this some more?

(I think my 90Q spends a lot of time in the wrong map... prolly time to
get a new knock sensor & clean the combustion chambers, eh?)

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/