V6 cylinders 2/6 do share a coil pack section. Since the coil pack is good, we should focus on the things that could affect 2 and 6.
Double check the spark plug wires and plugs. Many ppl do not realize that a grounded plug or plug wire will also affect it's twin.
Next check the low voltage coil pack connector. Is it clean and corrosion free? Pay special attention to the T/LG wire.
Next get a set of "noid" style test lights. They can be rented from your local autoparts store. Use the noid tester to confirm if there is a firing pulse coming from the PCM on the T/LG wire. If no pulse, then there is a wiring harness problem from the coil pack to the PCM or the coil driver in the PCM is bad.
Recommend performing a visual inspection of the PCM itself. Often a blown coil dirver is obvious. This will also offer a change to inspect the PCM electrical connector.
2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.