prom tuning help

[rr]

I think you might be outa luck with a Firebird TBI. If
I remember correctly, all 5.7L f-bodys of that year (maybe
most years), were TPI systems only.

The Caddy might be a TBI system though.

BobR.

ECMnut at aol.com wrote:
> 
> Hi Nolan,
> the AXKW  comes up as a 1991 5.0 liter VIN "E".
> It sounds like ya need the 5.7 Liter PROM as a starting point.
> I assume thisis a TBI system(?)  If so, does anyone know if the
> TBI units differ between 5.0 & 5.7 engines for the 91 F-body?
> Next, the 8746 ECM was found in:
>  90 Cadillac 5.7
>  89-92 5.0 Camaro/Firebird
>  89-90 5.7  Camaro/Firebird
> HTH
> Mike V
> 
> > A friend of mine has a 1990 firebird that was originaly a 305 tbi.
> >  Now it has a 350 with a ZZ3 cam. He is trying to sell the car
> >  but it idles like crap