Can someone confirm for me which wires I need to run to a VGs EFI and Alternator loom to make it run?

 

So, forget that the car and it's looms exist.

 

The engine needs to run as though it's not even mounted in the car.

 

I "Think" I need the 12v main live from battery to starter loom.

 

ECU live.

 

ECU Ground maybe?

 

And then I need a live to make the starter crank.

 

That will fire up the engine and it will run.

 

is that right?

the alternator + loom is not really necessary, unless you also want to charge the battery you are using while the engine is running (just for a couple of minutes I presume)

You will need a fuelpump to provide the fuel or, if you just want the engine to idle, a handpump will also work,

 

The ECU needs several 12V lives and grounds...easiest is to use the ground loops and main power connectors from the main EFI wiring harness.

if you are not using the original EFI harness it will be very hard to get it running as some parts (eg. the coils) need a separate power source.

 

http://300zx-twinturbo.com/cgi-bin/manual.cgi?list=efec&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=104&design=default&total=190

http://300zx-twinturbo.com/cgi-bin/manual.cgi?list=efec&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=118&design=default&total=190

 

Preferably the ECU also needs a start signal from a starter switch or something, otherwise it will be very hard to fire the engine up.

http://300zx-twinturbo.com/cgi-bin/manual.cgi?list=efec&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=144&design=default&total=190

 

-Eric