Measuring return rate of injection units at starter speed — VW

🧭 Before you start

Fits: VW Touareg II (7P, 2010–2018)

• Special tools named: V.A.G 1348/2
• Renewed: this injector

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• Clean and dry all return line connections (e.g. with standard commercially available cold cleaning solvent) before removing them.
• Activate starter 3 times, pausing for around 20 seconds after each starting attempt to ensure that starter does not overheat.

🔧 Engine codes this applies to

📋 Procedure

1. Pull off engine cover .
2. Clean and dry all return line connections (e.g. with standard commercially available cold cleaning solvent) before removing them.
3. ⚠ Danger of functional impairment due to contamination/soilingObserve rules for cleanliness . — Pull return line connections off the injectors by pressing the two tabs downwards and simultaneously pulling the centre piece upwards in order to release them (arrow).
4. In order to prevent fuel being injected during the attempt to start the engine, detach electrical connector from fuel pressure regulating valve N276(arrow) in high-pressure accumulator on right.
5. Fit hose lines onto return line connections of all 8 injectors.

6. Guide the 8 hose lines into the two V.A.G 1348/2 B on left and right.
7. Activate starter 3 times, pausing for around 20 seconds after each starting attempt to ensure that starter does not overheat.
8. If fuel comes out of an injector, replace this injector .
9. Connect electrical connector to fuel pressure regulating valve N276.
10. Installing fuel return lines
11. Because electrical connectors have been detached, faults have been stored in the engine control units: "“Read out event memory”" and delete.
12. Bleed fuel system and check for leaks .

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