10a. Fuel System Delivery: Notes
WARNING:
AVOID CONTACT WITH FUEL DURING A VISUAL INSPECTION FOR FUEL LEAKS WITH THE ENGINE RUNNING. DO NOT WORK ON THE FUEL SYSTEM UNTIL THE PRESSURE HAS BEEN RELEASED AND THE ENGINE HAS COOLED. FUEL IN THE HIGH-PRESSURE FUEL SYSTEM IS HOT AND UNDER VERY HIGH PRESSURE. HIGH-PRESSURE FUEL MAY CAUSE CUTS AND CONTACT WITH HOT FUEL MAY CAUSE BURNS. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY.
WARNING:
WHEN HANDLING FUEL, ALWAYS OBSERVE FUEL HANDLING PRECAUTIONS AND BE PREPARED IN THE EVENT OF FUEL SPILLAGE. SPILLED FUEL MAY BE IGNITED BY HOT VEHICLE COMPONENTS OR OTHER IGNITION SOURCES. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY.
NOTE:
The Flow Tester, Diesel Fuel 310-193 or equivalent provides a pressure reading while simulating maximum fuel consumption at wide open throttle (WOT) and full load on the fuel system. The Flow Tester, Diesel Fuel 310-193 or equivalent uses a 1.193 mm (0.047 in) calibrated orifice integrated in the tool assembly to simulate the fuel consumption.
NOTE:
Make sure the battery voltage is greater than 12.5 volts at all times throughout this procedure. Fuel pumps will not pass the fuel delivery tests if the battery voltage drops below 12.5 volts during the fuel flow tests. This is especially important if the test is carried out on a non-running vehicle because there are significant electrical loads when operating the fuel pump with the engine off. If the battery voltage drops below 12.5 volts, the battery may need to be charged or there may be a charging system concern, refer to the appropriate Charging System, Symptom Chart to continue diagnosis.