I have a 92 chevy blazer vortec will turn over but have no fire to the injector plug on top of the intake

The injector is inside the intake of the 92 4.3 vortec. There is a component on the top known as a tuning valve with a 2 wire connector. That isn't an injector

Ok but the plug with the two wires that go into the intake cover i have no fire to that plug

The red and blue wires? Are you testing with a noid light?

No a meter

The injectors pulse. I don't belive you can read them with a voltmeter. Do you have spark and fuel pressure?

Yes have spark and fuel pressure it will start if they take the pvc hose and put it in a bottle of gas

How much fuel pressure do you have? The injectors won't work under 50psi

Ok ill have him check