What year is it coming out of. i know the newer ones. I believe 1999.5 and up have an immobilizer on them. So you have to use the instrument cluster, or by a program to disable the immobilizer

You can install a mechanical Injector pump in the TDI motor and bypass all that wiring issues (single wire to run it) Or you can get a Hybrid pump that us a TDI/TD pump meshed together. Im still reading up on these things but as far as I can tell they make the best Engine swap out there in my opinion. I true no brainer.....good luck!