Pump Shot table Question $6E

[JN]

Thanks Mark.  This is my next step to modify the coolant/AE table.  Do you
know how the factor in the AE vs delta LV8 comes into play?  In other words,
if I increase the .125 factor at 64 LV8 to say .250 how much is that
increasing?  I assume it also relates to AE vs Coolant right?  I noticed in
a bin for an 89 automatic, the AE fuel vs coolant temp is set at 5% at all
places where ours are set to 0.

Jason
----- Original Message -----
From: "Romans, Mark" <romans at starstream.net>
To: <gmecm at diy-efi.org>
Sent: Monday, November 20, 2000 6:49 PM
Subject: Re: Pump Shot table Question $6E


> Jason:  It looks to me like the ecm still uses AE between 133 and 176
> degrees, it just
> doesn't multiply it by whatever multiplier.
> For example at 56dec C.  The multiplier is .195.  If you take N=E*256
> .195*256= 49.92, so it appears that .195 multiplier = a 49.92% increase in
> AE pumpshot.
> So looks like you might want to take that multiplier a bit higher up the
> temp list to see what
> happens.
> Mark
> ----- Original Message -----
> From: "JN" <jwn at sgi.net>
> To: <gmecm at diy-efi.org>
> Sent: Monday, November 20, 2000 6:15 AM
> Subject: Pump Shot table Question $6E
>
>
> > Thought I'd take a shot at on the list to see if anyone knows the
answer.
> > The table that I have been modifying to get rid of the dead lean and
back
> > fire on my 89 vette was the pump shot table listed as AE Enrichment vs
> > change in LV8.  This is listed as a value between 0 and .99 that can be
> > changed to increase AE fuel vs a change in LV8.  There is also a table
> were
> > you can tell the ECM how many pulses above the base pulse width to add
for
> > each of the 8 AE Enrichment pulses.
> >
> > Here is where I'm at.  I can get rid of the problem by modifying the
above
> > tables only when cold.  As soon as she warms up it acts up again and
pulse
> > widths don't increase as much as when cold.  So I then looking at all
the
> > threads about the WOT tables that uses coolant factors and RPM factors
to
> > calculate AFR it hit me to look at the AE fuel vs coolant temp.  There
it
> > was.  A big drop in AE fuel from 133 degrees to 176 degrees.   Above 176
> > degrees there is no AE enrichment.
> >
> >    So after all of this rambling, does anyone know how the ECM
calculates
> > the correct AE fuel using both the Delta LV8 and Coolant temp?
> >
> > Thank you,
> > Jason Norris
> >
>
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