Astro ECM

[Ward Spoonemore]

There are only tow possible "122xxxx" ECM's in Astro's, the 1227747 and
1228062.
1227747 in Astro's 87 - 90
1228062 in Astro's 88 - 91

The 1227747 is more popular in standard duty (GVWW lt 8500 lbs) 5.0l & 5.7l
equipped C/K trucks, 86 - 92.

The 1227747 is calibration template type $42
the 1228062 is calibration template type $4E

Both types have the same hardware but different firmware and thus different
calibration lay outs.

Ward

> -----Original Message-----
> From: owner-diy_efi at efi332.eng.ohio-state.edu
> [mailto:owner-diy_efi at efi332.eng.ohio-state.edu]On Behalf Of
> rauscher at icst.com
> Sent: Monday, January 18, 1999 7:02 AM
> To: DIY_EFI at efi332.eng.ohio-state.edu
> Subject: Astro ECM
>
>
>
>
> Was wondering if someone could help. I was at the
> 'U-pull-it' this weekend getting the final parts
> for my EFI system.
>
> Looking for a spare '747 ECM, I pulled from an
> Astro van an ECM that wasn't what I expected.
> I didn't get the year on the Astro van.
>
>
> I don't remember the number too well, but it was
> something like:
>
>     124x136 The 'x' being a number.
>
>
> It had the same form factor as a '747, so I pulled
> the PROM cover. It had a masked ROM in the holder,
> along with the resister pack, just like the '747.
> I put the cover back and left it there, as I found
> a true '747.
>
>
> Is this possibly an updated version of the '747?
> Should I have gotten it? What was it?
>
>
> BobR.
>
>
> --
>
>