I had this problem with a fiesta van i had i put a 1.6 carb engine in it but it all ready had xr2i efi clocks in it which is an electronic ignition not a coil 1 like on carb.i changed clocks to a non efi and it worked fine so you can change clocks that is if your car used to be efi??? or there is a wire you can join to the coil for it to work but cant remember which 1....