Is my 98 Pontiac Grand Prix gtp’s fuel pump bad?

My car would start a few days ago and spit and sputter,
then die. Now it will turn over but won’t start at all. I’ve
checked all the fuses and they’re good. I checked that the
wires for the fuel injectors were getting connection. The
fuel pump primes. The fuel resistor doesn’t smell of
anything and there was no sign of gas in it (or dripping
from it) when I checked. I checked the fuel pressure and
when I turned the key it was at the psi it should be at,
then drops completely in less than 2 mins. I don’t have
money for all new injectors and a fuel pump. Is there a
way to tell the difference between which one is the
problem?