Looks like I need to start out with the factory BIN in my 91 Formula (origianlly 305 TPI dual cat 3.42 rear T5) to tune my 383. Any one have an idea where I can find this BIN? Searched GOOGLE.com plus DYI-ORG to no avail.

I came up with this broadcast code by looking on my ECM case (it's actually on there) and verified by searching the web......



- Vern

 

No one have this?

 

Just grab AXYC from ftp://ftp.diy-efi.org/pub/gmecm/bin_lib/

It Superseded the AWFZ on 1/14/91, if my Caldata program is correct.

 

OK, I'll give that one a try. I noticed that it says it is for the 92 model year, and this is for a 91 Formula, 305 TPI with the dual cats and 3.42 posi. Does that still sound to you like the right one for me to use for a start point?

Thanks!



- Vern

 

AXYC supersedes the AWFZ so it probably wouldn't be available new anyway. That just mean GM made some changes, (that should be improvements.)

Yes, sounds like the one to start with to me.

 

That's the one I'll use - THANKS A BUNCH!!!!!!