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return valve. The internal fuel filter is also part of Fuel is supplied to the filter/regulator by the elec- tric fuel pump. The regulator acts as a check valve to If fuel pressure at the pressure regulator exceeds approximately 49 psi, an internal diaphragm closes. Both fuel filters (at bottom of fuel pump module and within fuel pressure regulator) are designed for FUEL TANK DESCRIPTION The fuel tank is constructed of a plastic material. Its main functions are for fuel storage and for place- OPERATION All models pass a full 360 degree rollover test without fuel leakage. To accomplish this, fuel and A rollover valve(s) is mounted into the top of the fuel tank (or pump module). Refer to Emission Con- An evaporation control system is connected to the rollover valve(s) to reduce emissions of fuel vapors FUEL INJECTORS DESCRIPTION A separate fuel injector (Fig. 4) is used for each individual cylinder. Fig. 3 Fuel Filter/Fuel Pressure Regulator Location 1 – FUEL SUPPLY LINE (TO FUEL RAIL) Fig. 4 Fuel Injector—4.0L/4.7L Engines 1 – FUEL INJECTOR 14 - 4 FUEL SYSTEM WJ DESCRIPTION AND OPERATION (Continued) |