Thinking to fit efi on mk3, it has a mfi s1 loom fitted and I have a mk4 efi cabby as a donor.
Do I need to split the efi loom right back to to the ecu and where do I join it in to existing loom?
Can I use the cabby engine and just swop blocks to make it turbo?. I've looked at the sticky but still a bit lost.
Cheers for any help.