Ford Repair Questions? Ask a Mechanic for Answers ASAP
Most likely, the coil driver inside the Powertrain Control Module (PCM) is stuck on - you can confirm this with a scope or by rigging a LED light.
Ford knows this is an issue and has issued a Technical Service Bulletin (TSB 13-417) to that effect. The repair includes replacing the PCM and all 6 ignition coils.
Please let me know if you have any questions.