Checking the fuel delivery rate of the fuel pump for delivery G6 (0.5 bar low-pressure fuel system) — VW
Checking the fuel delivery rate of the fuel pump for delivery G6 (0.5 bar low-pressure fuel system) on VW: factory workshop procedure for engines CBAA.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📋 Procedure
Checking the fuel delivery rate of the
fuel pump for delivery
G6
(0.5 bar low-pressure fuel system)
Special tools and workshop equipment required
Pressure gauge
VAS 6551
Container > 3 litre with measuring scale
Vehicle diagnostic tester
Test prerequisite:
Observe type of fuel system
Chapter
.
Fuses must be OK.
Battery voltage at least 12 V
All electrical consumers, e.g. lights and rear window heating, must be switched off.
Disconnect connector
A
on
supplementary fuel pump
V393
or
fuel pump 2
V277
.
Separate quick-release fastener
A
(black or with black marking) of fuel supply line. Separate plug-in connectors
Chapter
.
Connect line of pressure tester
VAS 6551/1
to fuel supply
A
.
Feed open end of line in the measuring tank.
Connect
vehicle diagnostic tester
, and then carry out guided function
“Checking electrical fuel pump(s)”
.
Note
The fuel pump is now actuated for 30 seconds.
When fuel stops flowing, read amount of fuel delivered as indicated on measuring container. Specification: min. 1000 ml/30 s
If the specification is not attained:
Make sure that fuel supply line between fuel pump and engine compartment is not kinked, crushed or damaged.
If necessary, renew defective line, and repeat test.
If it is not kinked, crushed or damaged, remove rear bench seat
General body repairs, interior
Rep. gr.
72
Rear seats; Removing and installing bench seat / individual seats
.
Detach carpet under seats, and fold it back
General body repairs, interior
Rep. gr.
70
Trims, interior; Assembly overview - foot rest and floor covering
.
Remove cover of fuel delivery unit.
Pull fuel supply line (black or black marking)
A
off fuel delivery unit. Separate plug-in connectors
Chapter
.
Connect line of pressure tester
VAS 6551/1
to fuel supply
A
.
Feed open end of line in the measuring tank.
Connect
vehicle diagnostic tester
, and then carry out guided function
“Checking electrical fuel pump(s)”
.
Note
The fuel pump is now actuated for 30 seconds.
When fuel stops flowing, read amount of fuel delivered as indicated on measuring container. Specification: min. 1000 ml/30 s
If the specification is not attained:
Check voltage supply
Chapter
and current draw
Chapter
of fuel pump.
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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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.