Checking vacuum between high-pressure fuel pump (venturi nozzle) and injectors — VW

🧭 Before you start

Fits: VW Polo 6R (2009–2014)

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• Then, check fuel system for leaks.

🔧 Engine codes this applies to

📐 51 workshop diagrams for CFWA

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

📋 Procedure

1. Make return line connection accessible. Release catch (1) to do this.
2. Pull fuel return line in direction of arrow off injector.
3. Ask a second mechanic for assistance.
4. Close shut-off tap of pressure testerVAS 6551(A) + (B) and open (C).
5. Connect connection (C) of pressure testerVAS 6551 with hose adapterVAS 6551/3 to fuel return line.

6. Connect hose adapterVAS 6551/4 to fuel return line connection on injector and hold free end into a ≤ 3 litre measuring container (3).
7. Switch on pressure testerVAS 6551 by pressing On/Off button and calibrate it.
8. Switch ignition on.
9. Start engine.
10. Read pressure on pressure testerVAS 6551.
11. Drain measuring container. [Note: Then, check fuel system for leaks.]

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