REMOVAL & INSTALLATION
See Figures 1 through 7
- Disconnect the negative battery cable.
- Disconnect the fuel lines from the inlet and outlet sides of the fuel pump.
- Plug these lines to prevent gasoline from leaking out.
- Unscrew the retaining bolts from the fuel pump and remove the fuel pump from the engine.
- Remove the old gasket from the engine and/or fuel pump.
- Clean all mounting surfaces.
- Using a new gasket, install the fuel pump in the reverse of the removal procedure.
See Figures 4, 5, 6, and 7Pressure Test
See Figure 8
Before proceeding with this test, verify there is no leakage. If leakage is found, repair or replace components as necessary.
If leakage is not apparent, the following pressure test should be performed.
- Insert a "T'' fitting into the fuel line at the carburetor.
- Connect a 5 in. (152mm) piece of hose between the "Tee'' fitting and a pressure gauge.
- Drain the fuel line leading to the carburetor in order to allow the pump to operate at maximum capacity.
- Connect a tachometer and start the engine. Allow the engine to run at idle speed. The fuel pump pressure should be 5.5-5.0 psi (24-34 kPa) for 5-cylinder engines or 4.0-7.0 psi (34-48 kPa) for V8 engines. When the engine is stopped, the pressure should return to zero very slowly. If it rapidly or instantly drops to zero, a leaky outlet valve is indicated.
- Disconnect the fuel line from the carburetor. Place the end of the line in a container holding at least 1 quart.
- The fuel pump output should be 1 quart in 1 minute or less at 400 rpm.
- If the pump doesn't operate as specified, replace the fuel filter and check for a pinched and/or blocked fuel line. If the pump output is still insufficient, replace the pump.