Netres availability

[Dan Griffin]

After Zeroing knock tables, truck runs better than it ever has since I began
this project.. And no more backfiring...Although am still getting sluggish
accelleration, and code 45 but less herky jerky feel than before... After
setting timing to spec. with '165 plugged in, There is definatly a
diffrence, with '747 in, I cant find the mark at all....If I can find a
couple used distributors cheap, Ill do some experimenting...As far as
netres, it looks like the one from the '6867 is gonna work for now... thanks
for all the help guys....
Dan
----- Original Message -----
From: Ludis Langens <ludis at cruzers.com>
To: <gmecm at diy-efi.org>
Sent: Monday, August 13, 2001 12:39 PM
Subject: Re: Netres availability


> Shannen Durphey wrote:
> >
> > I posted a list of ecms used with the 2.5 tbi engines.
>
> The problem is that not a one of them uses a removeable netres/CALPAK
> that could be plugged into a 1227747.
>
> > ECM/PCM: ECM #01225570
> > ECM/PCM: ECM #01225610
> > ECM/PCM: ECM #01226100
> > ECM/PCM: ECM #01226156
> > ECM/PCM: ECM #01226864
>
> The above five are hardwired for the 2.5 (and 1.8).  (BTW, I have mask
> ROM dumps of all of these.)
>
> > ECM/PCM: ECM #01227165
> > ECM/PCM: ECM #01227727
> > ECM/PCM: ECM #01227748
>
> The above three use a MEMCAL which includes a netres along with the EPROM.
>
>
> Just about the only netres option for this application is the netres
> from a 1226867 (which runs a 2.0).  The '6867 is a single injector TBI
> ECM - sort of the single injector version of the '7747.  Note that the
> '7165 replaced the '6867 in some vehicles.
>
> As long as you stay out of limp mode, a '7747 netres has three resistors
> of interest.  One announces to the CPU that the netres is plugged in.
> One announces to the limp home chip that the netres is plugged in.  And
> the third one switches the injector hardware between firing both
> injector outputs together, or firing them seperately.  Note that
> software also has to reprogram hardware to properly change the injector
> firing.  I don't know of the '6867 netres has this same pinout or not.
>
> --
> Ludis Langens
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