SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSAUDI1999A6 BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALFUEL SYSTEMFUEL SUPPLY SYSTEM - ALL ENGINESFUEL SUPPLY, ALL WHEEL DRIVE (AWD)FUEL PUMP DELIVERY VOLUME, CHECKING - VEHICLES WITH 8-CYLINDER ENGINE (OPEN LOOP SYSTEM)TEST SEQUENCE
1999 Audi A6 Base

Test sequence

1999 Audi A6 BaseSECTION Test sequence
WARNING:
  • Fire Hazard! Do not smoke, work near heaters or have anything in the area that could ignite the fuel or fumes.
  • Fuel supply lines are under pressure! Before loosening any lines, cover the connection with a rag. Release pressure by slowly separating the connection.
  • Open cover for fuse panel on driver's side under instrument panel.
  • Remove fuse 28 from relay panel (left-row, fifth large fuse from top).
  • Connect VAG1348/3A remote switch with VAG1348/32 adapter cable to cavity for fuse 28 -arrow-.
    Fig 1: Connecting VAG1348/3A Remote Switch To Cavity For Fuse 28
    G02721733Courtesy of AUDI OF AMERICA, INC.
  • Connect test probe to Battery Positive Voltage (B +).
  • Remove fuel filler cap.
  • Remove fuel return hose from line adapter
  • Attach auxillary hose to the distribution pipe and insert into container
    Fig 2: Connecting Auxillary Hose To Distribution Pipe And End With Container - Vehicles With 8-Cylinder Engine (Open Loop System)
    G02721734Courtesy of AUDI OF AMERICA, INC.
  • Operate remote maintenance for 15 seconds with the button depressed.
  • Compare amount of fuel with the desired value.

    *) Minimum delivery cm3/15 seconds

    **) Voltage at fuel pump with engine stationary and pump running (approx. 2 volts less than battery voltage).

    Fig 3: Fuel Pump Voltage Versus Fuel Delivered Graph - Vehicles With 8-Cylinder Engine (Open Loop System)
    G02721735Courtesy of AUDI OF AMERICA, INC.
  • Install the fuel return pipe with new hose clip.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.