different ECM's or ECM differences?

[Shannen Durphey]

The CPFI engines are Vortech engines.  It's easy to forget
that TBI was used on some Vortech engines also.  The CPFI
(VIN code W) has only one injector.  You can tell that you
have the CPFI selection when you can find something like
"intake air tuning valve status" on your scanner.  

As a side note, does Diacom run any types of ECM tests?  I
believe that the 8192 ECMs are bi-directional and will allow
direct control over some relays and whatnot.

Shannen

Jason Weir wrote:
> 
> TBK wrote:
> 
> > >almighty, Diacom lists 3 different configurations for the 91 4.3
> > (eng
> > >code Z and year code M) they are as follows,
> > >
> > >1991 GM/Chevy Truck 4.3 V6
> > TBI
> > >1991 Truck Lt-Duty Emisn 4.3 V6
> >
> > Vortec or CPI
> 
> My 91 vortech was TBI what is the difference in ECMs?
> 
> --
> Jason Weir
> 88 Wrangler - 258 Chevy TBI
> Fayetteville, North Carolina
> http://home.att.net/~jweir
> mailto:jweir at worldnet.att.net