Trouble Shooting: Notes
NOTE:
Diagnosis of fuel system should begin with a fuel pump pressure test. Connect Fuel Pressure Gauge (J-25400-300) to fuel line servicing fitting and measure fuel pressure while cranking engine. Use FUEL SYSTEM DIAGNOSIS chart if pressure is not between 9-12 psi. See Fig 1
. Use the DFI FUEL INJECTOR SYSTEM DIAGNOSIS chart if pressure is between 9-12 psi. See Figure
and Figure
.