I have a 90 iroc 5.7 TPI cranks but wont start.If I spray gas into the intake it will start and run as long as I spray the gas into the intake.I have changed the ECM ,fuel pump, and the distributer pickup.Anyone got any ideas??????

Do you have power and ground at the fuel pump? Could be a broken wire or high resistance.

Check your fuel injecters i had one on my car stick closed, any codes?

The fuel pump is working,and there is no trouble codes.If one or two injectors are sticking I would think that it would start on the others?

Your fuel pump may be working but is there 12 volts there? And the other guys are right on the fuel injectors as well. I have had those car before do that. The fuel injectors on those are run in series, so if one goes down it take them all down. You can try unplugging them one at a time to see if it will start or check the ohms on each one. Good luck

Thanks,I will check these things