esc is a late escort mk4 management early mk5 escort and early mk3 fiesta none single point injection ive got all my conversions on that my 2.0 16v silvertop rs16i rep and on 45s my shedscort 2.0 16v 40s silvertop my old van was on ebay that had bike carbs on cbr600 done loads of zetec mk3 mk4 conversions and use that management youve got 3 wires 1 you dont use black is live and brown earth thats it