F 150 2WD Pickup V8-351 5.8L (1986)
Fuel Pressure: Testing and Inspection
Fuel System Capacity Test
FUEL CAPACITY (VOLUME) TEST
-
Remove the carburetor air cleaner.
-
Slowly (fuel line is pressurized) disconnect the fuel line at the fuel filter.
WARNING: Use care to prevent combustion of spilled fuel.
-
Place a suitable non-breakable container (1/2 liter or 1 pint minimum) at the end of the disconnected fuel line (a piece of hose may be needed on
the fuel line end).
-
Disconnect high tension wire from coil.
-
Crank engine 10 seconds, the fuel pump should deliver 0.158 liters (1/3 pint) of fuel or more.
-
If fuel flow is to specification perform pressure test. See: Fuel Pressure Test
-
If fuel flow is low repeat procedure using a non-breakable container of gasoline connected to the fuel pump inlet.
-
If fuel pressure is to specification, the problem is either a plugged in-tank filter, or a kinked or leaking fuel pump inlet hose.
-
If fuel flow is still below specification, replace fuel pump.
