Have you checked to see if any fuel exit the injectors, maybe place them in a Plastic container and crank the Engine over, see if any fuel makes it out.
12v At the coil is correct. 3 injectors firing but not number 2..? Check the small terminals on the ecu's hairbrush, maybe a damaged wire within the loom. Try checking the injector output directly off the ecu by piggy backing the 2 outputs from the ecu, that way you can eliminate the harness to injector wiring.
No fuel At the rail, blocked fuel filter, kinked/collapsed fuel feed pipe? Bridge the fuel pump rel่ and run the pump constantly and see if the pump actually sucks up anything from the tank.