Re: ECM #

["nacelp" <nacelp@bright.net>]

There are applications, where unleded fuel is used legally, or was several
years ago, farming was one.
No it's not some miracle sensor.
I'm not going back to the leaded fuel sensor debate again, but there were
entire countries running leaded fuel thur there cars.  Now racing
(hotroding) cars and leaded kills em dead, quiker then "normal".
Try running some regular leaded thru it and see what happens.   Trouble is
very hard to get other than for form use, and that's like 87 or less anyway,
so it doesn't matter.
  -NM8 option was also used for some export models like the syclones that
went to arabia.
Grumpy


>Leaded fuel??
> It has O2 sensor and goes closed loop above idle. On Diacom shows O2 cross
> counts and swings back and forth between high and low O2 voltage when in
> closed loop.
> Does the O2 sensor hold up very well with leaded fuel? Does it use a
> "special" O2 sensor?
>
> >From: "nacelp" <nacelp@bright.net>
> >Reply-To: gmecm@diy-efi.org
> >To: <gmecm@diy-efi.org>
> >Subject: Re: ECM #
> >Date: Mon, 1 May 2000 11:52:03 -0400
> >
> >
> >It's one of the leaded fuel chips
> >89  454  1227747
> >-NM8
> >Grumpy
> >
> >
> > > This got me to thinking, my neighbor has a big block (454) rollback
that
> >has
> > > a 747, but I didn't pay attention to the rest of the numbers. The
thing
> >is
> > > it does not have a knock sensor. No wire in connector, so it appears
> >that
> >it
> > > never had a knock sensor. I read the bin and the knock tables are
zeroed
> > > out. It also idles in open loop. I think the bin is anty, have a copy
of
> >it
> > > at home.
> > >
> > >
> > > >From: Shannen Durphey <shannen@grolen.com>
> > > >Reply-To: gmecm@diy-efi.org
> > > >To: gmecm@diy-efi.org
> > > >Subject: Re: ECM  #
> > > >Date: Mon, 01 May 2000 00:00:41 -0400
> > > >
> > > >Hello, rr.
> > > >The 1228747 is typically used in a big block chebby truck, and I've
> > > >seen it used with large gvw smallblock equipped trucks.  It's not the
> > > >same as the 7747, but I can't tell you what the differences are.
> > > >Shannen
> > > >
> > > >rr wrote:
> > > > >
> > > > > I do believe it is Bruce. I've been holding onto
> > > > > four numbers for the '747 (for boneyard hunting):
> > > > >
> > > > > 1227747    the original
> > > > > 1228747    (Not sure about this one)
> > > > > 16121154 new service number?
> > > > > and
> > > > > 16133288, IIRC, a newer version of the '747,
> > > > >  possibly a different board inside, but functionally
> > > > >  the same.
> > > > >
> > > > > BobR.
> > > > >
> > >
> >
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