Fuel pressure at the injectors?

["deloreanfl" <ericp@xxxx>]

Just when I was getting comfortable with my understanding of the CFI
system on my D, I've confused myself.

Could somebody please set me straight with what "portion" of the Fuel 
injection system actually limits (or controls) the fuel pressure 
specifically at the injectors?

I realize the injectors are mechanical, and open at about 3-3.5 BAR.
I also understand the fuel distributor sends the fuel to the 
injectors, and that there is a System Pressure regulator inside the 
distributor.

I dug out my trusty gauge, measured the system pressure, control 
pressure (CPR)...etc. Compared them to the shop manual (all being 
within specs). But I cannot figure out why, with minimal air-plate 
deflection, not all of the injectors fire...but deflecting the plate 
further they all fire equally. 

Bad Injectors? Faulty Fuel Dist.?

BTW: all tests were done with the RPM relay bypassed, obviously all 
injectors removed.

Thanks
Eric
Dunedin, FL
VIN# 5557
ericp@xxxx