No gas will spray out of injections. How can I repair this?
1991 GMC 1500 Pickup Won't Start on 1991 GMC 1500 Pickup
Purchase a good repair manual and use the diagnostic information to diagnose the problem. There are good online manuals (alldatadiy.com, chiltondiy.com) that you can get easily and quickly, read up on how to diagnose this type of problem.
Injectors will only pulse when the engine is spinning. You need to test for this pulse at the injector and check the resistance of the injector itself.