[fastfredracing]

You sure you have not pinched a wire, or juxtaposed a few connectors when you had the plenum off? It happens to the best of us sometimes.
You need to be looking for batt+ at the injector, then look for pulsing ground at the other side of the injector . Follow the ground back to the ecm, or follow the hot side back to the fuse box, or whatever relay powers them up . If you apply power and ground to an injector, it should make an audible click.