Hello, You have 2 narrow band sensors upstream of your catalytic converter and 1 narrow band sensor downstream of your catalytic converter. We usually recommend the ?Quad Digital EFIE? in these cases because it has the digital circuitry and it?s the most flexible if ever used on a different vehicle.
If you are installing a MAP or MAF Sensor Enhancer on this vehicle also, you probably need are frequency based unit. To find out if your MAP or MAF is frequency based (alot of Fords are) you can call your car dealer service department.