Fuel supply system - Petrol engines

Emptying fuel tank with fuel pump intact, engine code CWVA

~2min read
Emptying fuel tank with fuel pump intact, engine code CWVA

Special tools and workshop equipment required

Removal wedge -3409-

Remote control -V.A.G 1348/3A-

Test instrument adapter/DSO (5-pin) -VAS 5565-

Fuel extractor -VAS 5190-

Fuel extractor -VAS 5190 A- for E 85 fuel (not shown).

Adapter for fuel extraction -VAS 5190-


Note

To extract E 85 fuel, use only fuel extractor -VAS 5190 A-!

Auxiliary measuring set -V.A.G 1594C-

Note
Emptying fuel tank with fuel pump intact, engine code CWVA
If the fuel extraction unit -VAS 5190- is still fitted with the extraction hose with a fixed tip, the extraction hose must be replaced with the version with a screw-in tip. Note

Separate plug-in connectors → Chapter.

  • Observe safety instructions → Chapter.
  • Observe rules for cleanliness → Chapter.
Emptying fuel tank with fuel pump intact, engine code CWVA
  • Pull off fuel supply line -1-. Separate plug-in connectors → Chapter.
The fuel system is pressurised.Risk of injury due to fuel which may spurt out.Wear eye protection.Wear protective gloves.Release pressure: place clean cloth around connection and carefully open connection.
  • Collect escaping fuel with a cleaning cloth.
Emptying fuel tank with fuel pump intact, engine code CWVA
  • Connect fuel extractor -VAS 5190- with adapter for fuel extractor -VAS 5190 /3- to fuel supply line.
  • Secure earth wire of fuel extractor to a bare metal part of the body.

Golf SV:

  • Remove right rear seat → General body repairs, interior; Rep. gr.72.
Emptying fuel tank with fuel pump intact, engine code CWVA
  • Partially detach cover -1- in floor covering at parting line -arrow-.
  • Do not detach cover completely from floor covering in order to ensure it is reinstalled in the correct installation position.
  • Detach it just enough that the cover can be folded upwards.
  • Fold up cover in -direction of arrow-.

Golf and Golf Estate:

  • Remove rear bench seat → General body repairs, interior; Rep. gr.72.
Emptying fuel tank with fuel pump intact, engine code CWVA

Continuation for all vehicles:

  • Unclip cover -1- for flange at retaining tabs -arrows-, using removal wedge -3409-.
Emptying fuel tank with fuel pump intact, engine code CWVA
  • Unclip sealing grommet -1- downwards from cover -2-.
  • Push cover -2- back along wiring harness -3-.
Emptying fuel tank with fuel pump intact, engine code CWVA
  • Release and pull off connector -arrow-.
Emptying fuel tank with fuel pump intact, engine code CWVA
  • Connect test instrument adapter/DSO (5-pin) -VAS 5565- to connector and fuel delivery unit.
  • Connect remote control -V.A.G 1348/3A- to test instrument adapter/DSO (5-pin) -VAS 5565- and to battery positive (+).
Note

This step serves only to have the fuel pump running when the engine is stopped.

Emptying fuel tank with fuel pump intact, engine code CWVA
  • Open tank flap unit -2-.
  • Clean area around fuel filler neck.
  • Unscrew cap -1- for fuel filler neck.
  • Operate remote control -V.A.G 1348/3A- and shut-off tap on fuel extractor -VAS 5190- until fuel tank is empty.
Note Risk of damage to fuel system pressurisation pump -G6- when the fuel tank is empty. The fuel system pressurisation pump -G6- must not run »dry«.
Emptying fuel tank with fuel pump intact, engine code CWVA

Test yourself

A quick Volkswagen Golf quiz: every answer comes with an explanation and a link to the manual page.