Checking fuel system pressurisation pump delivery rate — VW
Checking fuel system pressurisation pump delivery rate on VW: 15 steps, engines CAYB, CAYC, CLNA. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Jetta VI (16, 2010–2018), VW Golf V / Jetta (1K, 2003–2009); platform code AJ5
- Special tools named: VAS 6551/1
Don't miss
- The fuel pump is now activated for 30 seconds.
📐 80 workshop diagrams for CAYB
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- ⚠ Observe rules for cleanliness and the instructions for working on the fuel system .Wrap a clean cloth around the connection before opening the fuel system, then carefully loosen the connection to release the pressure. — Pull off fuel supply line (black or black marking) (3) from fuel delivery unit.
- Collect escaping fuel with a cleaning cloth.
- Connect connection (A) of pressure testerVAS 6551 with line VAS 6551/1 to open end of fuel delivery unit.
- From connection (B), insert hose adapterVAS 6551/2 into a ≥ 3 litre measuring container and hold in place.
- Switch on pressure testerVAS 6551 by pressing On/Off pushbutton.
- Close shut-off valves (B) and (C) of pressure testerVAS 6551.
- Switch ignition on.
- Connect vehicle diagnosis tester and carry out guided function "“Checking electric fuel pump”". [Note: The fuel pump is now activated for 30 seconds.]
- Carefully open shut-off valve (B) completely.
- Slowly close shut-off valve (B) again while taking pressure reading on pressure testerVAS 6551.
- Set specification to 5 ± 0.2 bar by carefully closing.
- Drain measuring container.
- Therefore, also connect multimeterV.A.G 1526 to outputs (1) and (5) of test instrument/DSO adapter 5-pinVAS 5565.
- Perform guided function "“Checking electric fuel pump(s)”".
- Compare the amount of fuel delivered with the read value from the table.
Ask TorqFix about your VW CAYB — 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 VW CAYB — free → or sign up free to see the drawingsOther VW procedures
- e) Checking sender wheel installation position on crankshaft · 3 torque figures
- Removing and installing engine mountings – Audi A8 D4
- Removing and installing intake manifold – VW Touareg I
- Removing and installing engine control unit J623, Golf Plus, Touran · 3 torque figures
- Removing and installing tensioner for poly V-belt · 1 torque figures
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
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.