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Audi Workshop Service and Repair Manuals

Fuel supply system, petrol engines > < Fuel filter and supplementary fuel pumpV393
Checking fuel system for leaks
Checking fuel system for leaks
Observe rules for cleanliness → Chapter.
A leaking fuel system can cause:
t  Foam build-up or air bubbles in the supply line.
t  Lack of power, misfiring.
t  Starting problems.
Checking fuel system and fuel lines for leaks
–  Check whether the seals on the flanges are damaged and whether the union nuts on the fuel tank flanges are properly tightened.
–  Perform a visual check on all fuel lines, fuel tank components and hose connections:
t  Fuel lines to engine
t  Fuel lines to fuel tank
t  Fuel cooler
t  Fuel filter
t  Fuel tank
   

Fuel supply system, petrol engines > < Fuel filter and supplementary fuel pumpV393