I'm midway thru my S5 13B-DEI into FB swap. I need to keep EFI for now, so I'm bringing over the ECU and engine harness as well.

My questions are:

A.) Do I need to remove and keep the driver's side wire harness from the donor car before I sell it this weekend for this swap to work? Or can I individually wire up the 2 sensors on the oil pan, and the wiring for the ignition coils? Which is less of a headache?

B.) Do I need to keep the fuel pump resistor relay, or any other relays?

C.) Can someone tell me what the two yellow/gold connectors go to on the S5 wiring harness in the BOTTOM of this picture:

Thanks in advance.

 

Bump, need to know before buyer gets here.