Delivery rate of fuel pump, checking (vehicles with 6-cyl. MPI-engine)

Special tools, testers and auxiliary items required

Fig 1: Identifying Remote Control Connection V.A.G 1348/3A

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2
Measuring container, fuel-resistant

Test conditions

Battery voltage at least 12.5 V.
Fuel filter OK
Fuel tank at least ¹ /₄ filled.
Fuel pressure regulator OK, checking →
- 24 MULTIPORT FUEL INJECTION (MFI) for 1.8 LITER 4-CYL. 5V TURBO FUEL INJECTION & IGNITION, ENGINE CODE(S): AMB
- 24 - MULTIPORT FUEL INJECTION (MFI) for 2.0 LITER 4-CYL. 4V TURBO FUEL INJECTION IGNITION, ENGINE CODE(S): BPG, BWT
- 24 MULTIPORT FUEL INJECTION (MFI) for 3.0 LITER 6-CYL. 5V FUEL INJECTION & IGNITION, ENGINE CODE(S): AVK, BGN
- 24 - FUEL INJECTION SYSTEM for 3.2 V6 4V FUEL INJECTION IGNITION, ENGINE CODE(S): BKH
- 24 - MULTIPORT FUEL INJECTION (MFI) for 4.2 LITER V8 4V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BNS
- 24 MULTIPORT FUEL INJECTION (MFI) for 4.2 LITER V8 5V FUEL INJECTION AND IGNITION, ENGINE CODE(S): BHF
.

Ignition switched off.

Test sequence

Open cover of fuse box at left side of instrument cluster.
Pull out fuse on fuse panel S228 (left row, 5th large fuse from top).

Fig 2: Connecting Remote Control V.A.G 1348/3A With Adapter Cable V.A.G 1348/3-2 To Right Socket Terminal Of S228

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 to right socket terminal of S228.
Connect alligator clip to vehicle battery (+).
Remove fuel filler cap from fuel filler tube.

CAUTION: The fuel system is under pressure! Before opening system, place rags around the connection area. Then release pressure by carefully loosening the connection.

Disconnect fuel return hose from line connection on fuel rail pipe.

Fig 3: Connecting Extension Hose Onto Fuel Rail And Hold It In Measuring Container

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Connect assisting hose onto fuel rail - arrow - and hold it in a measuring container.
Press switch on remote control for 15 seconds.

Fig 4: Delivery Rate Diagram

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Compare quantity of fuel delivered with minimum delivery rate in diagram (cm ³ /15s).

NOTE:

Voltage at fuel pump with engine stopped and pump running is approx. 2 volts less than battery voltage.

Installation is in reverse order of removal. Note the following:

NOTE:

Secure all hose connections using hose clamps appropriate for the model type .

Install fuel return hose.