Checking delivery rate of fuel pump G6 - 4-cylinder and 6-cylinder engines (generation II) and 4-cylinder EA 288 engines (generation I) — AUDI

🧭 Before you start

Fits: Audi Q5 (8R, 2008–2017)

• Special tools named: VAS 6551

Don't miss

• Disregard (item 2).
• Disregard (items 1, 3).
• Risk of fuel escaping.Make sure that drain tap (C) is closed.The lever should point perpendicular to direction of flow. — Open cut-off valves (A and B).
• From this point on do not change position of cut-off valve (B).

🔧 Engine codes this applies to

📋 Procedure

1. Remove filler cap from fuel filler neck.
2. ⚠ Observe rules for cleanliness when working on the injection system . — Disconnect fuel supply hose (1). [Note: Disregard (item 2).]
3. Disconnect fuel supply hose (2). [Note: Disregard (items 1, 3).]
4. Connect pressure tester (diesel)VAS 6551 to fuel supply line with connecting lineVAS 6551/5-2 and secure with hose clip.
5. Attach connection leadVAS 6551/5-3 and hold end of connection lead into fuel-resistant measuring container.

6. Connect pressure tester (diesel)VAS 6551 to fuel supply line with connecting lineVAS 6551/5-2 and secure with hose clip.
7. Attach connection leadVAS 6551/5-3 and hold end of connection lead into fuel-resistant measuring container. [Note: To measure the fuel delivery rate, pressure must first be built up in the fuel supply line; the fuel pump must then operate against this pressure during the measurement. This pressure can be built up using the pressure tester (diesel)VAS 6551 as follows:]
8. ⚠ Risk of fuel escaping.Make sure that drain tap (C) is closed.The lever should point perpendicular to direction of flow. — Open cut-off valves (A and B).
9. Connect vehicle diagnostic tester.
10. Switch on the ignition and select the following menu options on the vehicle diagnostic tester:
11. Press Start: The fuel pump will start running.
12. Build up pressure in fuel system by slowly closing cut-off valve (B) until correct pressure has been reached.
13. From this point on do not change position of cut-off valve (B).
14. Press Stop.
15. Drain measuring container.
16. For measurement, press Start again and let fuel pump run for 15 seconds.
17. Press Stop after 15 seconds.
18. Check amount of fuel delivered in measuring container.

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