4.5 Caddy swap,computer?

I'm trying to get the caddy 4.5 engine to run in my fiero. Built the pass key module to get the fuel injectors to work. Need to know where the module output wire goes into caddy computer?
Any other computer mods required to get it to run right?
Any help?
THANKS

moe,
Welcome to AF.
as far as most GMs, your ECModule out, should run through a fusible link, and into either the BAT/POS(+) side of the starter solenoid (if close), or straight through the POS(+) side of the battery; or into the junction block and into the ECM (via another fusible link)

on ALL Fiero's this would be in the harness as orange, but on your Cady (depending what yr/model for the computer) would be either orange or purple w/wht stripe
the fusible links are your option, but I'd rather smoke two dollar links, than $$$ harnesses and modules any day.
also, might re-post this in Cadillac specific forum, your 4.5 came out of, or on the racing forums, as many have made 4.5/4.9L conversions.

hope this helps,
chris
nrt racing

I'm trying to get the caddy 4.5 engine to run in my fiero. Built the pass key module to get the fuel injectors to work. Need to know where the module output wire goes into caddy computer?
Any other computer mods required to get it to run right?
Any help?
THANKS
Thanks for Your help,
The Caddy engine will not run without bypassing the Caddy computers theft deterrent system.
Need to know where the theft deterrent passkey module clone output wire goes into the Caddy computer.
Any help is appreciated!
Thanks,
Nick