Sprinter 3500 L5-2.7L DSL Turbo (2004)
Fuel Pressure: Testing and Inspection
Low Pressure Fuel Pump Test
NOTE:
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Assure fuel tank quantity and proper fuel gauge operation. Assure that the fuel pump fuse or relay is not open. Capture any fuel spillage and store
in appropriately marked containers.
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When the ignition switch is turned to the on position the fuel pump will begin to run for 20-30 seconds and then it stops.
The low pressure pump draws fuel out of the fuel tank module mixing bowl and pushes the fuel towards the fuel filter. If the pressure reading is below
specification, look for damaged or leaking fuel lines or a restricted fuel filter. If no problem is found with the fuel system replace the low pressure fuel
pump.
1. Disconnect the negative battery cable
Fuel Gauge Connect At High Pressure Pump
2. Connect a fuel gauge to the low pressure fuel supply to the high pressure pump
3. Connect negative battery cable
