I started another thread about my gm 3800 v6 swapped 1983 280zx where i, on a tangent, mentioned efi problems on a 79 280zx w/an l28e I'm having as well, unfortunately the 79 has evolved into a bigger project so i decided to dedicate its own thread to it. So here is the run down okay on the 79 datsun 280zx electrical problem. The fuel pump wasn't turning on. the wiring between the fuel pump and relay 1 (green and black wires) is good, the green with white stripe between relay 1 and 2 is good, and the black with red strip coming from the ignition is good. the fuel pump sees 2 volts when in ACC, 0 volts in ON, and 9 volts (basically 12 but the starter is lowering it) under crank. are there any other wires involved that could be severed or any components not working. possibly a bad ground or bad relay? To solve this temporarily we bypass the the wire that closes the Fuel pump relay, thus allowing the fuel pump to turn on when the key is in on. The car cranks but won't start, even with the operating fuel pump, pressure at the rail and spark. We now noticed the injectors aren't firing. We are gettin no signal/volts at the injector harness & the efi relay clicks but im not sure if its sending signal.