Checking fuel pump delivery rate - vehicles with 4-cylinder FSI engine — AUDI

🧭 Before you start

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

• Special tools named: V.A.G 1348, V.A.G 1318/12

Don't miss

• Disregard items (2 ... 5).
• Open cut-off valve on pressure tester. Lever must point in direction of flow.
• From this point on do not move position of cut-off valve.
• Voltage at fuel pump with engine stationary and pump running is approx. 2 volts less than battery voltage.

🔧 Engine codes this applies to

📐 52 workshop diagrams for ALT

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 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. Take off engine cover panel (arrows).
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 supply line (1) from pipe connection on engine. [Note: Disregard items (2 ... 5).]
8. Connect K-Jetronic pressure testerV.A.G 1318 with adaptersV.A.G 1318/11 and V.A.G 1318/12 to fuel supply line.
9. Fit auxiliary hose (arrow) onto pressure tester and hold end of hose in measuring container.
10. Open cut-off valve on pressure tester. Lever must point in direction of flow.
11. Build up pressure in fuel system by pressing the remote control and slowly closing the cut-off tap on the pressure gauge.
12. From this point on do not move position of cut-off valve.
13. Empty the measuring container.
14. Press remote control button for 15 seconds.
15. 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.]
16. Connect fuel line.

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