Are you positive it's metal? There is a service bulletin on the Dukes
electric
fuel pumps to replace vanes with Nitralon ones. They were breaking and
gumming up things downstream.

Do you get the pressure with the electric pump that you should?

It's hard to imagine how metal could get into the fuel pump. There is
a seal between
where the oil is and where the fuel is. When it fails, the ususal
problem is fuel leaking
OUT.

Could the fuel pump be destroying itself? There is a very fine screen
in the
distributor on top of the engine... that is where the metal would be.
I can't imagine
how it would get into the injectors.

Bill Hale BPPP Instructor