Has a discharge check valve to maintain system pressure during shutdowns and to minimize starting problems. There is a fuel filter screen located at fuel rail side of fuel injector, and the fuel filter assembly is located between fuel pump and pressure test point/Schrader valve.ġ0. The Fuel Pump (FP) module is a device that contains fuel pump and fuel sender assembly. Screen mounted on intake side of fuel pump. On vehicles not equipped with a Schrader valve, use Rotunda Fuel Pressure Test Kit (134-R0087) or equivalent.ĩ. There are 3 filtering or screening devices in fuel delivery system.
Supply pressure for service and diagnostic procedures. For additional fuel injector information, see FUEL INJECTORS under FUEL CONTROL.Ĩ. A pressure test point valve (Schrader valve) is located on fuel rail. Fuel injector is normally closed and is operated by a 12-volt VPWR signal from power relay. Amount of fuel is controlled by length of time fuel injector is held open. Opened and closed a constant number of times per crankshaft revolution. Information is used to vary fuel pressure and avoid fuel system vaporization.ħ. The fuel injector is a solenoid-operated valve that meters fuel flow to each cylinder. Information to vary duty cycle output to FPDM to compensate for varying loads.Ħ. The Engine Fuel Temperature (EFT) sensor measures current fuel temperatures in fuel rail. For additional FPDM information, see FUEL PUMP DRIVER MODULE under COMPUTERIZED ENGINE CONTROLS.ĥ. The Fuel Rail Pressure (FRP) sensor provides PCM with current fuel rail pressure. Is supplied by power relay or FPDM power supply relay. 4. The FPDM modulates voltage to Fuel Pump (FP) to achieve proper fuel pressure.
0 kommentar(er)
