how to bypass bcm? engine conversion

[v6feroza]

i have recently dropped a ecotec into my feroza, I have the vx/vy wiring loom and only need the starter motor to work when key is turned, no interior accessories or dash or radiator or sensors am I better of manualy using the starter through a switch?
also I will need the pcm to work for the injectors, how do I power that?
is it connected to the BCM that I do not want to use?
any help will help.. I'm losing faith In this project

 

[The1]

yep normally in vx/vy bcm powers and controls the starter relay, so use whatever originally did the starter in your car. The PCM will need vats disabled so the injectors will work without a bcm.

 

[v6feroza]

Thanks mate will research vats
Am i able to hard wire the starter?
Could be a little harder using old starting method due to having ripped out my original wiring

 

[The1]

yeh id just wire it through a switch

 

[RayNixon]

you can buy BCM simulators that trick the ECU into stating without the BCM...

alternative, you need to have the VATS removed from the ECU...