Checking fuel pump delivery rate - 6-cylinder engine: Audi A3 (AXW, AXX, BAG, BDB, …)

🧭 Before you start

Fits: Audi A3 (8P, 2003–2012)

• Special tools named: V.A.G 1348, V.A.G 1348/3, V.A.G 1318/17

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• Voltage at fuel pump with engine stationary and pump running is approx. 2 volts less than battery voltage.

🔧 Engine codes this applies to

📋 Procedure

1. Remove filler cap from fuel filler neck.
2. Remove rear seat bench 72.
3. Unclip the retaining tabs (arrows) for the flange cover (right-side).
4. Unplug electrical connector (arrow) at flange.
5. Connect remote controlV.A.G 1348/3A for V.A.G 1348 to contact (1) using adapter cable V.A.G 1348/3-3 and test lead from auxiliary measuring setV.A.G 1594C.

6. Tape off 2nd connector contact of adapter cable V.A.G 1348/3-3 with insulating tape (arrow) to prevent short circuits.
7. Connect contact (5) to the body (earth) using a test lead from auxiliary measuring setV.A.G 1594C.
8. Connect crocodile clip to battery "“+”".
9. ⚠ Risk of injury - fuel system operates under high pressure.To reduce the pressure in the fuel system, wrap a clean cloth around the connection and carefully loosen the connection. — Press release tab and disconnect fuel return line (arrow).
10. Fit adapter V.A.G 1318/17-1 onto disconnected fuel return line and hold adapter hose in measuring container.
11. Press remote control button for 15 seconds.
12. Compare amount of fuel delivered with minimum delivery shown in diagram (cm3/15 sec.). [Note: Voltage at fuel pump with engine stationary and pump running is approx. 2 volts less than battery voltage.]
13. Install rear seat bench 72.

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