Re: PCM Questions

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

Well, just up until recently we were using old stuff here, and I miss the
orange glow against the walls at night when things are running.  Also, miss
the NIXY tube displays,  I still don't beleive this color stuff is here to
stay either <g>
Grumpy

> The P6 PCM (non OBD II versions), covers a large range, starting with
Cad's
> Northstar in about 90/91, Saturn then 92/95 Vette, LT1, 92 - 95 C/K truck
> and so on. It supports 4l60, 4l60E, 4l80E and manual, DIS and HEI, TBI and
> Multi Port, 4, 6 and 8 Cyl.
>
> In other words just about everything after 1992. A ten year old design.
>
> It's a HC11F1 proc with a faster clock rate, 256k to dual 512k Flash
menory.
>
> 8192 serial communcations.
>
> A good choice all things considered, since the P4 processor is a 20 year
old
> design. A bit long in the tooth for electronics. Any you guys using 20
year
> old PC's?
> Ward
> On Fri, 17 Mar 2000 01:04:10 -0600, gmecm@diy-efi.org wrote:
> >  Hope you guys don't mind some PCM questions... I can't search the
> >  archives, I haven't been able to connect to it in a week.
> >  Anyone have info on a 16196401 PCM?  It was used 94-95 in the 3.4 DOHC
> >  engine.
> >  On the outside it LOOKS like a 1227727.  It is the successor to the
> >  16149396 (used 91-93 on the 3.4 DOHC), which I believe is just a
1227727
> >  with extra SRAM.  The big change I noted is SFI.
> >  So I thought maybe the 6401 is a 7727 with SRAM and additional quad
> >  drivers for SFI, but then I looked at the pinouts, and it's 100%
> >  different.  Same four 22-way connectors, but the pinouts aren't even
> >  CLOSE.  It does, however, seem to use a MEMCAL, though I don't know for
> >  sure because I don't have one to play with.
> >  Another question: P6 PCMs, how does a DIY'er read the software from
> >  them, and reprogram them?  I'm sure this is in the archives, but the
> >  archives aren't accessible.  I'm mainly talking about the 16196397 PCM.
> >  Also, what's the difference between the 16172693 and the 16196397?  I'm
> >  going to guess these are both pre-OBD II.  Info on P6 PCMs seems to be
> >  kind of scarce.
  Thanks for any info.
> >  Shawn Lin
> >  http://www2.cybercities.com/g/gmwbodycars/


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