FB4 Check Fuel Pump Flow Volume

^ Observe Fuel Handling Instructions in Technician Safety Information section.

^ Release the fuel system pressure. Fuel System Pressure Relief





^ Connect the Rotunda Fuel Pressure Testing kit 014-00748, or equivalent between the fuel filter and fuel rail, with the main valve closed and the drain valve opened.

^ Place the bypass hose (yellow) in a measuring container inside an empty overflow container.

^ Key ON. (Fuel pump will run for 5 seconds.)

^ Collect fuel in the measuring vessel for 5 seconds.

^ Key OFF.

^ Key ON. (Fuel pump will run for 5 seconds.)

^ Collect fuel in the measuring vessel for 5 seconds.

^ Is the amount of fuel collected between 94.3-157cc (3-5 ounces)?

YES -- GO to FB5. FB5 Check Fuel Pump Valve Leakdown

NO -- SERVICE the fuel pump inlet screen, and RERUN this test.
If flow volume is still not within specified limits, REPLACE the fuel pump and RERUN Test F1. F1 Perform Fuel Pressure Test