[Gmecm] Back to square one

[davesnothereman at netscape.net]

Actually, many 4 cylinder calibrations are dedicated to 4 cylinders.  
The math for compensating for more or fewer cylinders is not part of 
the code.

Zaphod

-----Original Message-----
From: Robin Handley <Robin at FuryWorld.fsnet.co.uk>
To: gmecm at diy-efi.org
Sent: Tue, 16 May 2006 09:14:07 +0100
Subject: Re: [Gmecm] Back to square one

  > At 06:54 PM 5/15/2006 +0100, you wrote:
> >This got me wondering; why did GM build in the ability to switch 
between
1
> >BAR and 2 BAR MAP sensors in $58 when they didn't actually produce a
vehicle
> >which used it? :-)
> >
> >R
>
> They were bored?
> According to the doc, that $58 code supports 3,4,6 & 8 cylinders too.
> MV

True, but the $58 code is actually used in 4 & 6cyl modes - and the
#cylinders logic seems common to all GM code - but not the MAP range
selection logic, AFAIK. Maybe GM started with a NA code/calibration and
tweaked from there? I wouldn't normally speculate, except that a 
non-turbo
$58 P4 calibration would be pretty useful to me... :-)

R

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