Closed Loop Disable in $6E

[ae2598 at wayne.edu]

Good question.. why wait to go into closed loop?  Why does the factory do
it?  Maybe to give you "choke" fuel enrichment for smooth startup?

I take it you haven't had any objectionable cold-starting problems with
the low C/L enable?

On Tue, 30 Jan 2001, Bruce Plecan wrote:

> 
> ??
> Closed loop enable of 107dC ??
> That's higher then normal operating temp..
> 
> FWIW, I usually use lower then stock enable temps when I'm done.
> Why waste the gas, when you have the cal right, no need to wait around.
> My TCC enable is like 50dF, and
> C/L is about 90dF, I think
> 
> Bruce
> 
> 
> 
> > Simply out of curiousity (I'm going to burn a chip and try it for the
> > halibut) the value at $445 in $6E is $6B.  If I use Craig Moates' Qbasic
> > code for 165 ALDL comm it equated to 104.45 deg (assume F) using the
> > following formula:
> >
> > degF = (HEX_VALUE * .75 - 40) * 1.8 + 32
> >
> > If I assume it simply correlates to direct temp then it is either 107degF
> or
> > 107degC.  Any idea which way is right?  Just curious mind you.
> >
> > Thanks for the help!!!  I got discouraged when I thought I might not be
> able
> > to tune this car in open loop to see if I could get the mileage up before
> > taking other more drastic measures.
> >
> > Steve
> >
> > -----Original Message-----
> > From: Bruce Plecan [mailto:nacelp at bright.net]
> > Sent: Tuesday, January 30, 2001 12:45 PM
> > To: gmecm at diy-efi.org
> > Subject: Re: Closed Loop Disable in $6E
> >
> >
> >
> > Take say Hexshop,
> > go to 0445
> > set to FE
> > correct check sum
> > Drive car.
> >
> > My *way*
> > also disable, codes  13-44-45
> > I have seen a few 747s get confused by not diabling the diagnostice flags,
> > so rather then risk messin around, I just do it all at once.
> > Cheers
> > Bruce
> > --------------------------------------------------------------------------
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