Have this rouge wire on my TN (red and black) sticks out near the wiper servo
( I have just finished putting EFI on my car)
And the git who had it before me put a KIll switch on and i can't work out what it does it has some thing to do with that WIRE
i can get the engine to turn over but no SPARK!!!!! grrrrr
i looked through the manual (gegorys) and im stuck as to which wire it is
any one know???

No spark? Uhh around there could be either transistor, make sure thats right, could also be the Crank angle sensor in the dizzy. You said there was no spark so i wouldnt think its the fuel pressure solenoid.

otthewise it could be one of a million wires going to the ECU, it is located behind the firewall there