Soz a bit of a miss type

One is a 1990 xr3i efi
The other is a 130ps xr3i mk5.

What it is i am putting a zetec in the mk4. Got the engine loom but not main loom as car was nicked before i got it out.

The prob is there is a 8 pin multi plug on the engine loom that joins main loom. Wondered what each pin does on ecu. That way i may be able to use some of the standard wires in the mk4 instead of having seperate relays etc. Any help?