Quote Originally Posted by Gray
Quote Originally Posted by u33db
He means a phase 1 ECU has no immobiliser so nothing to worry about wiring wise.
Right sorry for sounding a little dense but if i put the 16v engine in, keeping my PH3 RSi main loom and using a 16v engine loom...

I could just plug a ph1 16v ECU and jobs a good en?
Yes thats right - you only need to swap the engine looms.