1987 Pontiac Grand Am fuel injection

Welcome to the forum, thanks for the donation. Engine cranking, can you see injector spray pattern? Also, with engine cranking, check for spark at the plugs. My first thought is missing rpm signal, can't be sure without testing? The rpm signal comes from the crank sensor. If you have spark at the plugs, it isn't the crank sensor.

I forgot to ask, do you have distributor or dis ignition?

OK, check for injector spray pattern and spark at the plugs. You can also check for B+ at the injector connector, key on. The computer grounds the injector in order to pulse, if there is an rpm signal.