How do you replace fuel pump on 79 280zx?

Answer 1

First, release the fuel pressure in the system. Either unplug the wiring harness to the pump which is located under the foam padding by opening the rear hatch, lifting the foam up and locating the two wire plug toward the passenger seat or get a container and a big rag and disconnect a hose from the fuel filter located under the hood, passenger side. Jack up the rear of the car and install jack stands for support. The fuel pump is located on the passenger side above the wheel axel. If using a Nissan original pump replace in reverse of removal. If using auto parts store universal pump you will have to cut wires and add eye ends to fit new pump. VERY IMPORTANT to be sure to find '+' and '-' markings on the old pump and the new universal pump for correct attachment. If lucky enough to get the exact replacement the pump comes with the wire loom to reattach in the hatch area. Also, having just replaced my '79 280ZX pump with universal pump, they supply a brass fitting that screws onto the plastic end of the pump. This is about 1/2" in diameter, the other end is a banjo fitting much smaller that the 1/2" end. The hose size from the tank to the pump is about the 1/2" size where the hose from the pump to the engine is the smaller size. There was no marking on the pump as to the direction of flow, so the only answer is to attach the hoses as they fit the car.