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STANDARD PROCEDURE - HOSES AND Inspect all hose connections (clamps and quick con- nect fittings) for completeness and leaks. Replace Fuel injected vehicles use specially constructed hoses. When replacing hoses, only use hoses marked When installing hoses, ensure that they are routed away from contact with other vehicle components The hose clamps have rolled edges to prevent the clamp from cutting into the hose. Only use clamps Inspect all hose connections such as clamps, cou- plings and fittings to make sure they are secure and Never attempt to repair a plastic fuel line/tube. Replace as necessary. Avoid contact of any fuel tubes/hoses with other vehicle components that could cause abrasions or FUEL PRESSURE REGULATOR DESCRIPTION A fuel pressure regulator is used on all gas pow- ered engines. It is located inside the fuel pump mod- OPERATION The pressure regulator is a mechanical device that is calibrated to maintain fuel system operating pres- It contains a diaphragm, calibrated springs and a fuel return valve. Fuel is supplied to the regulator by the electric fuel pump through an opening tube at the bottom of reg- The fuel pump module contains a check valve to maintain some fuel pressure when the engine is not If fuel pressure at the pressure regulator exceeds approximately 56 psi, an internal diaphragm closes The pressure regulator is a mechanical device that is NOT controlled by the PCM or engine vacuum. REMOVAL The fuel pressure regulator is part of the fuel pump module (Fig. 8). Remove the fuel pump module WARNING: FUEL SYSTEM PRESSURE MUST BE (1) Spread tangs on pressure regulator retainer (Fig. 8). (2) Pry fuel pressure regulator out of housing. ulator (Fig. 9). Fig. 8 Fuel Pressure Regulator 1 - FUEL PRESSURE REGULATOR 14 - 6 FUEL DELIVERY ZB FUEL TUBES/LINES/HOSES AND CLAMPS (Continued) |