wiring help needed, basically i have a fiesta turbo on ofac, i have just purchased a mk 4 xr3i which is efi aswell and i want to swap the engines over and managment, the fiesta turbo has a 7 pin plug that connects to the car loom, so what i need to know will the fiesta engine loom plug straight into the xr3i one and work, if not can someone help with what pin does what in the plug ?

 

no real need to change your loom mate just swap the ecu and map sensor,
works mint i done it to my orion mk2 never had a problem yet happy days lol
good look cheers mike