Checking fuel pump delivery rate - vehicles with 8-cylinder MPI engine — AUDI

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

• Special tools named: V.A.G 1348

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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. Open fuse box cover on left-hand side of instrument panel.
2. Take out fuse in fuse holder S228 (left row, 5th large fuse from the top).
3. Connect remote controlV.A.G 1348/3A for V.A.G 1348 with adapter cableV.A.G 1348/3-2 to right-hand terminal on socket of fuse S228.
4. Connect crocodile clip to positive (+) terminal of battery.
5. Remove filler cap from fuel filler neck.

6. Remove cover (1) at right of engine compartment.
7. ⚠ The fuel system is pressurised. Before opening the system place a clean cloth around the connection. Then release pressure by carefully loosening the connection. — Disconnect fuel return hose from hose connection on fuel rail.
8. Fit auxiliary hose (arrow) onto fuel rail and hold end of hose in measuring container.
9. Press remote control button for 15 seconds.
10. 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.] [Note: Secure all hose connections with the correct type of hose clips (same as original equipment) Parts catalogue.]
11. Connect fuel return hose.

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