I have a 95 astro awd how can i tell if my injectors are going bad?

When my Chevy had gunked-up injectors (ironically right after using a injection cleaner) it wouldn't barely run at all. It will act exactly like you'd think it would: as if the engine wasn't getting much fuel. Have you tried to see if they are just gunked-up or clogged. Worked for me in the past.