Checking delivery pressure of fuel system pressurisation pump G6, engine code CFHC — VW

🧭 Before you start

Remove the engine cover panel in the sequence shown, separate the black fuel supply line and connect the pressure tester with its two lines. Set the taps, start the engine and close valve B for no more than 15 seconds while reading the pressure. If needed, repeat the test at the fuel delivery unit under the rear seat. A delivery pressure that drops means renewing the fuel delivery unit; running problems call for a new fuel filter.

Fits: VW Golf Cabriolet (517, 2011–2016)

• Special tools named: VAS 6551/1, VAS 6551/2
• Renewed: fuel delivery unit

Don't miss

• Pull the engine cover panel off in the sequence shown; the bracket on the cylinder head cover can break.
• Close or open valve B for no more than 15 seconds while taking the reading.
• Delivery pressure specification is at least 0.5 bar; a temporary drop means a new fuel delivery unit.
• Pull on every push-fit coupling after reconnecting to confirm it is secured.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

📐 64 workshop diagrams for CFHC

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

📋 Procedure

1. Remove engine cover panel 10Engine cover panel; Removing and installing engine cover panel.
2. Pull engine cover panel upwards out of fastening elements in areas of (arrows) and in sequence shown.
3. ⚠ Bracket for engine cover panel on cylinder head cover may break off if removed improperly. Remove engine cover panel according to following instructions under all circumstances. — To do this, grip beneath engine cover panel as far as possible.
4. Separate connection (A) (black or with black marking) of fuel supply line. Separate connectors .
5. Connect pressure testerVAS 6551 with cables VAS 6551/1 and VAS 6551/2 to open ends of fuel supply line.

6. Switch on pressure testerVAS 6551 by pressing On/Off push button.
7. Open shut-off taps "“A”" and "“B”" of pressure tester and close shut-off tap "“C”".
8. Start engine and run at idling speed.
9. Close shut-off valve "“B”" for a maximum of 15 seconds and, during this period, take pressure reading on pressure testerVAS 6551. Specification at least 0.5 bar.
10. If the delivery pressure temporarily drops, renew fuel delivery unit .
11. In the event of engine running problems, renew fuel filter to eliminate potential fuel filter blockage problem.
12. Remove rear bench seat General body repairs, interior72Rear seat; Removing and installing bench seat / individual seats.
13. Fold carpet to the side or forwards.
14. Unclip cover (1) for flange at retaining tabs (arrows), using removal wedge3409.
15. Pull fuel supply line (black or black marking) (A) off fuel delivery unit. Separate plug-in connectors .
16. Connect pressure testerVAS 6551 with lines VAS 6551/1 and VAS 6551/2 to open ends of fuel supply line.
17. Switch on pressure testerVAS 6551 by pressing On/Off push button.
18. Open shut-off taps "“A”" and "“B”" of pressure tester and close shut-off tap "“C”".
19. Start engine and run at idling speed.
20. Open shut-off valve "“B”" for a maximum of 15 seconds and, during this period, take pressure reading on pressure testerVAS 6551. Specification at least 0.5 bar.
21. Checking fuel pump delivery rate [Note: Ensure push-fit couplings are secured properly by pulling.]

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