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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. Use Injector System Diagnosis chart if pressure is between 9-12 psi.
Fig 1: Fuel System Diagnosis
G594
NOTE: See Figure for pin and circuit number locations.