Astro Van PCM was--->Running a 305 with '747

[Kurek, Larry]

OK...I finally got off my duff, and verified the PCM and calibration code on
the Astro. This is an 88 4.3 TBI engine, FWIW. It is NOT a 747, but probably
a derivative...:

ECM: 1227137
Cal Code: FJD  also had 8515 on the chip.

So...any thoughts? Will 747 calibrations work on the ECM? I just need to
change the backup chip and the main PROM and away I go...right? How do I
select a V8 vs a V6 with this ECM? The wiring diagram doesn't show a
cylinder select pin I ground or leave open...

Thanks!

Larry

 
> lol...  get the #, I'll try to cross it.  Just to spite me, it will be
> something different. : )
> Shannen
> 
> Kurek, Larry wrote:
> > 
> > <SNIP>
> > 
> > > Uhh...
> > > Ummm...
> > > Well...
> > > The astro uses a 1227747, the same ecm used for tbi 
> trucks from 4.3l
> > > all the way up to 454 ci.
> > > The calpack is different between the smallblock v-8 and the 4.3l.
> > > Enough said??
> > 
> > Well....it *isn't* a '747, but something different (I don't 
> have the number
> > in front of me...). If this is just a 747 by another name, 
> sweet! I can take
> > care of it then. Just wanted to verify with the list. FWIW, 
> does anyone have
> > the link for the ECM x-ref page someone had up?
> > 
> > Thanks!!
> > 
> > Larry
> > 
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