Not starting after secondary fuel filter changed

[KRGC]

I changed the primary and secondary fuel filter. Unfortunately, I drained my battery trying to get fuel to the secondary filter. The problem I'm having now is that I used the primer pump to get fuel to the secondary filter, but it is still not starting. I loosened the banjo bolt closest to the front of car and used the primer pump until fuel squirted out. And I did the same with the second banjo bolt on top of the secondary housing. But it is still not starting. And I'm at my wits end. I used the search feature, but would just like to know if there is something that I'm overlooking?
Thanks in advance
Charlie
Oh the car is a '85 300D