Forgive my ignorance ofthe 6. 4 Ford, but isn't it a common rail diesel with a particulate filter? Maybe even a Bosch piezo-injector system? Does that not sound familiar? Is there any reason why leaking injectors combined with a DPF won't send flames out of a 6. 7? Without more info, I wouldn't be limiting this to a Ford only problem - it may be that a DPF is just a leaky injector detector. And did I read something wrong, or did they say a cracked turbo shaft caused fuel leakage into the exhaust? Hows that happen? Maybe they are using an exhaust mounted injector to produce regen cycle EGTs - if that was the problem I would feel better about the chances of this happening on a 6. 7.
On the other hand, anything that forces Dodge to replace leaky injectors might not be all bad . . .