Chrysler R4495391 Fuel Pump

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If the fuel pressure is above specifications, disconnect the primary wires from the ignition coil and remove the return hose. Connect a short section of hose and direct it into a fuel container. Have an assistant crank the engine and check for a plugged return line. If the pressure is now correct, the problem is a restricted return line. Finally, detach the vacuum hose from the fuel pressure regulator and observe the gauge for an increase in pressure. If there is no increase, replace the fuel pressure regulator.

Use a hammer and a BRASS punch to remove the fuel pump lock ring in a counterclockwise direction. Lift the fuel pump and O-ring out of the tank. Clean the sealing area of the tank and install a new O-ring. Inspect the fuel inlet sock filter for damage and contamination, replacing it if necessary. Place the fuel pump in position, install the locking ring, and use a hammer and a BRASS punch to secure it. Finally, install the fuel tank.