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Home >> Audi >> 2021 >> S8 >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel Supply >> 20 Fuel Supply >> Fuel Tank >> Fuel Tank, Draining >> Fuel Tank, Draining, Vehicles With TFSI Engine, Fuel Delivery Unit (Fuel Pump) Faulty

Fuel Tank, Draining, Vehicles With TFSI Engine, Fuel Delivery Unit (Fuel Pump) Faulty

Special tools and workshop equipment required 

Procedure 

-- Move the front seats all the way forward into the highest position.

-- Switch off the ignition.

-- Attach the : VAS5190/2  -2- to the suction hose -1- on the : VAS5190A  .

GWWA20-11564Courtesy of AUDI OF AMERICA, LLC

-- Open the fuel filler door.

Fig 1: The Fuel Filler Cap
GWWA20-11587Courtesy of AUDI OF AMERICA, LLC

-- Remove the fuel filler neck cap -arrow-.

-- Remove the bench seat / right single seats. Refer to BENCH SEAT/SINGLE SEAT, REMOVING AND INSTALLING .

-- Fold the insulation mat over the sealing flange cover to the side. Separate it at the perforations if necessary to do so.

Fig 2: Sealing Flange Cover
GWWA20-11934Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows- and the sealing flange cover -1-.

CAUTION:

There is a risk of the fuel tank exploding due to electrostatic discharge.

Severe injuries and burns are possible.

- Attach the fuel siphoning device ground cable to a bare area on the body.

-- Remove the fuel line -2- from the sealing flange. Refer to CONNECTOR COUPLINGS, DISCONNECTING .

GWWA20-11942Courtesy of AUDI OF AMERICA, LLC

-- Connect the suction hose with the : VAS5190/2  to the connection on the sealing flange.

GWWA20-11950Courtesy of AUDI OF AMERICA, LLC

-- Extract the fuel using the : VAS5190A  .

The Remaining Steps to Be Performed Will Depend on the Issue.

-- Remove the fuel delivery unit. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING .

-- Remove the Fuel Level Sensor -G-. Refer to Fuel Level Sensor -G-, REMOVING AND INSTALLING .

-- Remove the fuel tank. Refer to FUEL TANK, REMOVING AND INSTALLING .