Trouble Shooting & Diagnosis: Notes
NOTE:
Diagnosis of fuel system should begin with determining correct fuel pump operation. Connect Fuel Presssure 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. See Figure
for pin and circuit number locations.