Checking injection quantity: Audi A8 D3 (APF, ASN, AVK, AVU, …)

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Renewed: defective fuel injector

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• Also check the spray pattern when testing the injection rate. The spray pattern should be the same for all injectors.

🔧 Engine codes this applies to

📋 Procedure

1. Place a fuel injector in a measuring glass for injection rate testerV.A.G 1602.
2. Connect one of the contacts of fuel injector to engine earth using test lead and crocodile clamp from adapter setV.A.G 1594 A.
3. Connect second contact of fuel injector to the remote controlV.A.G 1348/3 A with adapter cableV.A.G 1348/3-2.
4. Connect crocodile clamp to positive (+) battery terminal.
5. Switch on ignition.

6. Press the remote controlV.A.G 1348/3 A for 30 seconds.
7. Carry out test for all fuel injectors using a new test glass each time. [Note: Also check the spray pattern when testing the injection rate. The spray pattern should be the same for all injectors.]
8. Once all 6 injectors have been actuated, place measuring glasses on a level surface.
9. Switch off fuel pump (switch off ignition).
10. Renew defective fuel injector .
11. Check fuel pressure .
12. Install injectors together with fuel rail .

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