Premium octane fueling maps

[Alan Pritchard]

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Oh DOH!!!! I did not understand the operation of cis3 before..... I thought
that it just backed the ignition off a bit at a time until knocking
stopped..... doh..... so im running at something like 18 btdc (Bentley
reckons 15) so chances are its swapping maps on me........ does that show in
the flash codes?

Best Regards,
Alan Pritchard
Network Administrator

Seaeye Marine Ltd.

Tel.  01329 289000
Fax. 01329 289001
www.seaeye.com

-----Original Message-----
From: Mihnea Cotet [mailto:c_mihnea at yahoo.com]
Sent: Thursday, March 06, 2003 8:09 AM
To: JShadzi at aol.com; suffolk.associates at verizon.net; quattro at audifans.com
Cc: SuffolkD at aol.com
Subject: Re: Premium octane fueling maps

The Motronic is indeed adaptative and once it has
"sensed" that full ignition advance can't be reached
without knocking for a few times (you won't notice the
knocking, we're talking of a very subtle level of
knock here), it will use the retarded maps. I think it
will always try to see if fully advanced maps can't be
used "just in case" but I'm not 100% positive. Anyway,
filling an almost empty tank with 92 or 93 octane
(american octane) and probably disconnecting the ECU
for a few minutes will help get it back to fully
advanced maps, as disconnecting it will erase its
adaptative memory.

HTH,

Mihnea
--- JShadzi at aol.com wrote:
> --
> [ Picked text/plain from multipart/alternative ]
> I'm not positive about the 3B maps, but my intuition
> is that the Motronic has
> a certain level of "adaptability" and isn't as
> simple and discrete as the
> earlier CIS3 system to switch between one map or
> another, there is more
> complexity involed.
>
> Javad
>
> In a message dated 3/5/2003 8:45:39 PM Pacific
> Standard Time,
> suffolk.associates at verizon.net writes:
>
> > So back to the 3B:
> > Does the fueling map reset after each start or is
> there
> > some "proceedure" I should follow?
>
>
>
>


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