No fuel to the rail. will not fire.

1st check fuse to fuel pump, and fuse to fuel pump relay.
You might want to have a look here in Bimmer Forums
Thread Z3 Won start Fuel pump Relay problems

If they are OK, you'll need to be sure no wiring on this age 17 car still good
(I have a '97 328i convertible, fun to drive, but what went wrong *this* week)
So check for voltage *at* the fuel pump, it won't run w/o power.
If that's ok, then you are down to either a bad fuel pump, or blockage in fuel line, probably at filter.
(a) See if pump is actually pumping fuel out.
(( FIRST, listen, and see if you hear motor running ))
(b) Since you may now already have fuel line disconnected at pump end, disconnect other end, and use bicycle pump, or some other source of pressurized air and see if the line is clear.
In *any* event, I'd change the fuel filter.