What do I need check when fuel injectors are not spraying?

i have 1990 ford f150 was stalling when engine warms up i replaced the coil, modual, and electric fuel pump i have discovered the injectors are not spraying if i squirt fuel in the trottle body it try to run.

fuel injectors are electronic so I'd make sure they're getting voltage and if they are I'd next check the injectors themselves though its not likely they'd all get clogged to that point at the same time. after that I'd check the fuel filter