Checking delivery pressure of tandem pump, engine codes AXB, AXC, BRR, BRS — AUDI

🧭 Before you start

Fits: VW Transporter T5 (7H), VW Transporter T5 (7J), VW Transporter T6 (7E), VW Transporter T6 (7F)

• Renewed: tandem pump, seal

Don't miss

• The fuel and the fuel lines in the fuel system can become very hot (danger of scalding)!Wear protective gloves. — Unscrew plug (arrow).
• After removing pressure gauge, tighten sealing. Always renew seal.

🔧 Engine codes this applies to

📐 38 workshop diagrams for AXB

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

📋 Procedure

1. ⚠ The fuel and the fuel lines in the fuel system can become very hot (danger of scalding)!Wear protective gloves. — Unscrew plug (arrow).
2. Connect tandem pump testerVAS 5187 with adapterVAS 5187/7 as shown.
3. Start engine and run at idling speed.
4. Connect .
5. Select Read measured value block in Engine electronics.

6. Read off idling speed in .
7. Increase speed to 4000 rpm.
8. Check displayed pressure on pressure gauge.
9. Using a hose clamp, clamp off return line between fuel filter and tandem pump.
10. Increase speed to 4000 rpm.
11. Check displayed pressure on pressure gauge.
12. Renew O-rings for unit injectors 23Injectors/high-pressure accumulator (fuel rail).
13. Renew tandem pump . [Note: After removing pressure gauge, tighten sealing. Always renew seal.]

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