Audi Workshop Service and Repair Manuals

Special tools and workshop equipment required

• ◆ Hose clamps 3094

• ◆ Cooling system tester V.A.G 1274 with adapter V.A.G 1274/11

Leaks in the fuel system may result in the following:

• ◆ Foam build-up or air bubbles in the supply pipe
• ◆ Loss of power, misfiring
• ◆ Starting problems

Work sequence

• ‒ → Attach adapter 1274/11 to cooling system tester V.A.G 1274.
• ‒ Unscrew return pipe from injection pump and connect hose from adapter V.A.G 1274/11 in its place.

• ‒ → Fit hose clamps 3094 at the following points:
• ‒ On supply hose downstream of fuel filter
• ‒ On return hose downstream of fuel filter
• ‒ On return hose from injection pump
• ‒ Use hand pump on tester to create a pressure of between 1.0 and 1.5 bar.
• ‒ If the pressure constantly drops, locate leak and eliminate fault.

Note:

By moving the hose clamps from the filter to the fuel tank connections it is also possible to test the fuel hoses.