Fuel System Residual Pressure
- Tee fuel pressure gauge into fuel supply line. Start engine and let it idle. With cold engine, minimum residual fuel pressure specification is 32 psi (2.2 bar). With hot engine, minimum residual fuel pressure specification is 44 psi (3.0 bar).
- If residual fuel pressure is minimum or more, residual fuel pressure is okay. If residual fuel pressure is less than minimum, check fuel lines for leaks and repair as necessary. Check fuel injectors for leaks. See FUEL INJECTOR TEST . Check fuel pump check valve for malfunction. See FUEL PUMP CHECK VALVE TEST .