93 grand am fuel injection

i have a 93 grand am 6 cyl FI, i stopped in for coffee at a store and came out to start it up and it would turn over but not start, checked for spark and it has spark, having trouble checking if the fuel is getting to the injectors, i noticed that there is a tire valve type of fitting right on the injector bar i took the cap off and pushed it down, all that came out was a little puff of air. is that bad?? is the fuel pump bad?? is the fuel pump in the tank or outside of the tank. dont know what to do!!!!
PLEASE HELP!!

Would your Grand Am happen to be a....Nissan Sentra?

Seriously though, I have no idea what the problem is.

first, post in the correct forum...
second, hook up a FI pressure guage to that tire valve thingy and crank your car while someone looks at the guage. then look up the specs and see if your getting enough fuel