Audi Workshop Service and Repair Manuals

Note:

Description of function

.

• Fuel gauge sender -G
• ◆ Checking resistance
  
• ◆ Removing and installing
  => Page 20-62
• Fuel delivery unit
• ◆ Testing fuel pump (electrical test)
  => Page 20-45
• ◆ Removing and installing
  => Page 20-50
• ◆ Can only be renewed as a complete unit

• Fuel return hose
• O rings
• ◆ Renew
• Fuel return pipe
• ◆ From fuel filter
• Fuel supply pipe
• ◆ To fuel filter
• Flange
• ◆ Cannot be renewed separately
• ◆ Installation position: note position of arrow => Page 20-58
• Connector
• ◆ For fuel pump and fuel gauge sender -G

• Union nut, 60 Nm
• ◆ Remove and install with spanner 3217
• Seal
• ◆ Renew if damaged
• ◆ When installing, fit seal (dry) in opening in fuel tank
• Fuel hose
• ◆ From fuel pump to baffle housing and fuel pump to suction jet pump
• Baffle housing (outer section)
• ◆ With suction jet pump
• ◆ Cannot be dismantled
• ◆ Shown without fuel tank for clearer illustration.

Description of function

The electric fuel pump delivers fuel from the baffle housing in the fuel tank to the tandem pump located on the engine.

Therefore it is no longer necessary to bleed the fuel system if the tank has been run dry or after performing repairs on components of the fuel system.

The electric fuel pump also sends a pressurised stream of fuel into a suction jet pump (entrainment pump) at the bottom of the baffle housing. The suction jet pump delivers fuel from the bottom of the fuel tank to the electrical fuel pump via the baffle housing.