Nissan Micra Fuel Pump Static Pressure Test & Diagram - EF & EC-9

This service manual page covers the mechanical fuel pump operating test for a carbureted Nissan engine (uploaded as applying to a 1990 Nissan Micra). It opens with a warning to disconnect the battery ground cable before working on any part of the fuel system, and notes that the fuel pump cannot be disassembled. A labeled engine-bay diagram shows the carburetor, fuel filter, fuel pump, and the IN/OUT hose routing back to the fuel tank, plus a cutaway illustration of the fuel pump itself (figure SEF863A). The Static Pressure Test procedure instructs the technician to connect a T-connector with a suitable pressure gauge and check static fuel pressure with the engine running at various speeds. The specification given is a fuel pump static pressure of 19.6–26.5 kPa (0.20–0.27 kg/cm², 2.8–3.8 psi); if pressure is out of specification, the fuel pump must be replaced. A second illustration (SEF864A) shows the pressure gauge connected in-line with OUT and IN flow directions marked. The page also advises using a container to catch fuel remaining in the hoses when disconnecting them. Page reference: EF & EC-9 (Engine Fuel & Emission Control section).