Checking delivery pressure of fuel system pressurisation pump G6, engine codes AXD, AXE, BLJ, BNZ, BPC — AUDI
Checking delivery pressure of fuel system pressurisation pump G6, engine codes AXD, AXE, BLJ, BNZ, BPC on Audi: 12 steps, engines AXB, AXC, AXD, AXE.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Transporter T5 (7H), VW Transporter T5 (7J), VW Transporter T6 (7E), VW Transporter T6 (7F)
- Special tools named: VAS 6551, VAS 6551/1, VAS 6551/2
- Renewed: fuel delivery unit
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- If specifications are obtained, renew fuel filter to ensure the fuel filter is not blocked.
📋 Procedure
- Remove front left underbody cover General body repairs, exterior66Underbody cover.
- Press the circlip to release the fuel line and then detach the fuel supply line (1).
- Connect pressure tester (diesel)VAS 6551 with hoses VAS 6551/1 and VAS 6551/2 to open ends of fuel supply line (1).
- Switch on pressure tester (diesel)VAS 6551 by pressing On/Off 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 tester (diesel)VAS 6551. Specification: at least 0.5 bar.
- Place pressure tester (diesel)VAS 6551 onto windscreen so that measured value can be read from inside vehicle.
- Increase idling speed to 2500 rpm, and read pressure shown on pressure tester (diesel)VAS 6551. 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 .
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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.