yeah, change the plug to suit the ACT and thats fine, mount up the co2 sensor, although as said you should have one somewhere, but for this part yeah thats right mate.
the ecu your bidding on, tbh, it prob wont stay at £60, i sold a OFAC ecu and engine loom out of a FRST for a mate for £140 inc post, but on ebay it would of got at least £20 more, so yeah its worth bidding on, but watch the chip, it may not work, on the other hand it might, thats a guessing game with s/h chips tbh mate.
and yeah to remove it you put pull it out the bottom of the ecu.
0.5 bar (7psi) is fine.
as for the engine loom (wiring system you said) the plusg are the same, and will fit the turbo ecu etc etc, but, the difference is where wires go in that plug, to be honest a good 90% of the wires stay where they are, and its just a few that have to be moved, not all the sockets in the ecu plag are filled so its just a case of takeing one connection out of one socket and moving it to the socket needed for the ecu used.
for example, lets say a sensor wire on the escort is in pin number 20, this is right for the ecu your using, not on the frst ecu, lest say for that sensor the wire has to be in pin 30, you take it out, move it to pin 30 and jon done.
corse, there is more than 1 wire that needs moving and if you plan to run a amal valve you need to put new wires in from the ecu plug as non turbo EFI cars dont have a amal valve, but again its a case of putting them in the right numbered socket for the given ecu used.
so in short, the engine loom that connects to all your sensors etc can still be used with the rubo ecu if you move a few wires about on the ecu plug, and seeing as you basicly have a xr2i set up i would imagine the pin changes needed would be the same, i have never converted a escort EFI engine loom so cant say from first hand but a friend has im sure, but i will post up the details need to convert looms to the given ecu etc and hopfully you could work out what would need to be done to make it work with what ever code of ecu you win.
These pin changes alow you to run FRST management without an Amal valve, if you decide to add an amal valve for a reason you will need to take a pin out of a scrap EFi Ford ECU plug and run a wire from one side of the new AMAL valve to ECU pin 33. The other side of the amal valve plug goes to a good earth point or any plain brown wire.
Converting an 8v 2i loom to OFAB
1) At the ECU, pin no. 27 (marked on the multiplug, brown wire) needs moving to pin 8, which is empty (this is the CO adjuster signal wire).
2) Pin no. 45 (brown/yellow) needs moving to pin 27 - this is for the MAP sensor.
3) EDIS Module pin 2 (blue/yellow) may now be disregarded as it is not used by the 0FAC ECU (pin 28 on ECU).
MAP Sensor re-wire:
At the MAP sensor multiplug...
1) Move the brown wire (gnd) to cossie MAP sensor pin no. 1 (marked on multiplug).
2) Move the brown/trace* wire (feeds back to ECU on pin no. 26) to cossie MAP sensor pin no. 2
3) Move the brown/yellow wire (feeds from pin no. 27 on the ECU) to cossie MAP sensor pin no. 3
4) On one of the Cossie MAP Sensors fixing holes there is a metal ring which goes into the sensor. This ring must be earthed, and when you mount the Cossie map sensor using the right brackets, it connects to earth. (You should only ever mount the Weber/Cosworth MAP sensors with the vacuum pipe pointing downwards).
Converting an XR2i loom to OFAC
1) Pin no. 8 (brown) needs moving to pin 27, which is empty (CO adjuster signal wire)
2) Pin no. 27 (brown/yellow) needs moving to pin no. 45
3) EDIS Module pin 2 (blue/yellow) may now be disregarded as it is not used by the 0FAB ECU (pin 28 on ECU).
There are no MAP sensor pin changes as the OFAC MAP sensor is the same plug as the 2i MAP Sensor, so just plug and play.
OFAB to OFAC
Revert back to (OFAC) with these pin changes on the MAP Sensor. These changes assume you have the MAP sensor sitting with the part code (stamped in the side of the sensor) and plug locking latch facing you.
1) Move Cossie MAP pin no. 1 to pin no. 3 (brown).
2) Move Cossie MAP pin no. 2 to pin no. 1 (brown/trace*)
3) Move Cossie MAP pin no. 3 to pin no. 2 (brown/yellow)
* brown and trace denotes any colour trace as i have come across many colours but usually it is either a green or a black trace.