Take the negative battery terminal off, put it back on after 45 minutes, then, drive the truck for a week, making as many stops as you can, where you turn the truck off and go into a store for like 20 minutes. After a week, take it in, it should be ready. There is an exact procedure from Ford, but I no longer have access to it. A Ford dealer may give it to you if you ask the Service Manager nicely. Tell him you need the OBD reset instructons to reset readiness for emmissions testing. Make sure you drive at least 400 to 500 miles during the week also.
Source: Former Ford Service Director