I think the injectors in my 22re pickup may be clogged. We unfortunately ran 10 year old gas in it a few years ago and now it won't stay running. Should I attempt to clean them myself or just get new ones?

heck, try cleaning them. Watch this video , and realize a mechanic has special equipment like that to power clean em on the truck https://www.youtube.com/watch?v=bKGI9N_yWd0&t=69s