Checking delivery pressure of fuel system pressurisation pump G6 — AUDI
Checking delivery pressure of fuel system pressurisation pump G6 on Audi: 12 steps, engines CAAA, CAAB, CAAC, CAAD.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Transporter T6 (7F), VW Transporter T6 (7E)
- Special tools named: VAS 6550/1, VAS 6550/2
- Renewed: fuel delivery unit
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- If specifications are obtained, renew fuel filter to ensure the fuel filter is not blocked.
📐 31 workshop diagrams for CAAA
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- Remove front left underbody cover (arrow).
- Press the circlip to release the fuel line and then detach the fuel supply line (1).
- Connect pressure testerVAS 6550 with cables VAS 6550/1 and VAS 6550/2 to open ends of fuel supply line (1).
- Switch on pressure testerVAS 6550 by pressing On/Off push button.
- Open shut-off taps "“A”" and "“B”" of pressure tester and close shut-off tap "“C”".
- Start engine and run at idling speed.
- Read pressure shown by pressure testerVAS 6550. Specification: at least 0.5 bar.
- Place pressure testerVAS 6550 onto windscreen so that it can be read from inside vehicle.
- Increase idling speed to 2500 rpm and read the pressure shown on the pressure testerVAS 6550. Specification: at least 0.25 bar.
- If the delivery pressure temporarily drops, renew fuel delivery unit .
- If specifications are obtained, renew fuel filter to ensure the fuel filter is not blocked.
- Check fuel pump delivery rate .
Ask TorqFix about your Audi CAAA — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.
Ask about your Audi CAAA — free → or sign up free to see the drawingsOther AUDI procedures
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.