Won't Start

When n engine wont start, begin by checking for spark to the plugs and fuel pressure to the injectors. If that's OK, make sure the injectors are operating correctly. These few tests will generally get you pointed in the right direction. There is one thing to remember, with almost all newer vehicles, there is an ability to update the engine control module software, and most manufacturers will have software to fix some of these types of problems. You would need to check with Ford to see if there are any Technical Service Bulletins that address this issue.