Update wired the Omex 200 ecu in today with the fuel pump and into the loom with a relay.
Also the MSA cut off switch.
Now !! Can start the car then take the ignition key out completely and the car still runs?
Also remove the cut off switch with the car still running?
Any help appreciated.

Hi,
Where is the ECU getting it's power from - is it off of the ignition switch which is where mine is fed from.

Regarding the cut-off, you need to take the alternator feed through the switch as well and provide a path to earth for it (via a resistor) otherwise the alternator will keep the car alive.

I have wired the two red ecu wires into the relay I have for the fuel pump then from the relay to the cut off switch battery side that gets 12v.

Hope that makes sense...