i'm got the new secondary fuel rail..
my question is where is the first fuel start?


fuel pump--> fuel filter--> primary injectors--> secondary injectors--> fuel pressure regulator (aeromotive) --> return to the tank


or


fuel pump--> fuel pressure regulator--> secondary injectors--> primary injectors--> fuel filter --> fuel pump??

i have 1993 fd please let me know thanks...

either way gonna work?

 

In any fuel system, the FPR is always last.

Pump -> filter -> fuel rails -> FPR -> return line