Testing quantity of fuel delivered — AUDI
Testing quantity of fuel delivered on Audi: 19 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
📋 Procedure
- Pull fuel line (on heater unit side) off fuel pump G23 and seal it.
- Push (approx.) 1000 mm-long fuel hose (1) onto fuel pump G23 and set free end in measuring glass (2).
- Switch on auxiliary heater.
- Switch heater off as soon as fuel flows from the fuel hose into the measuring glass and wait for run-on period to end.
- Empty measuring glass (2) and set fuel hose in measuring glass again.
- Switch on auxiliary heater.
- Fuel delivery begins approx. 45 seconds after switching on.
- Fuel supply is switched off automatically after 90 seconds.
- Switch auxiliary heater off and compare quantity of fuel delivered (in measuring glass) with the values in the table (see the separate procedure).
- Pull fuel line (on heater unit side) off fuel pump G23 and seal it.
- Push (approx.) 1000 mm-long fuel hose (1) onto fuel pump G23 and set free end in measuring glass (2).
- Switch on auxiliary heater.
- Switch heater off as soon as fuel flows from the fuel hose into the measuring glass and wait for run-on period to end.
- Empty measuring glass (2) and set fuel hose in measuring glass again.
- Switch on auxiliary heater.
- Fuel delivery begins approx. 45 seconds after switching on.
- Fuel supply is switched off automatically after 90 seconds.
- Switch auxiliary heater off and compare quantity of fuel delivered (in measuring glass) with the values in the table (see the separate procedure).
- Renew fuel pump G23.
Other 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 → · How these pages are made →Workshop data on this page last updated 20 Sep 2026.