Checking using compression tester: Audi A4 B9 (DESA, DETA, DEUA, DEUB)

🧭 Before you start

Fits: Audi A4 B9 (8W, 2015–)

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• Using the compression tester Operating instructions.

🔧 Engine codes this applies to

📋 Procedure

1. Remove engine cover panel .
2. Unplug electrical connector on fuel pressure regulating valve N276(item 2).
3. Briefly start engine to relieve fuel pressure in high-pressure reservoir.
4. Remove all glow plugs .
5. Screw in adapterV.A.G 1763/8 in place of corresponding glow plug and connect compression testerV.A.G 1763. [Note: Using the compression tester Operating instructions.]

6. Have a second mechanic operate starter until tester shows no further pressure increase.
7. Repeat procedure on each cylinder.
8. Install glow plugs .
9. Install engine cover panel .
10. Erase any entries in event memory resulting from testing .

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