OK, I just double checked before I fill your head with :bull crap: .
We have had several customers with complaints of hard starting/no start conditions on late model 7.3s. The injectors seem to be either plugging up or shorting...something causes them not to squirt, and it happens once you get around/over 100K miles. We had a customer come in today asking about it, actually. AFAIK, replacing the injectors cures it.