Fuel pump delivery quantity, checking (vehicles with 1.8L Turbo engine)

Special tools, testers and auxiliary items required

Fig 1: Adapter V.A.G 1318/17-1 From Adapter Set V.A.G 1318/17

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Adapter V.A.G 1318/17-1 from adapter set V.A.G 1318/17

Fig 2: Identifying Remote Control Connection V.A.G 1348/3A

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Remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2
Fuel-resistant measuring container

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) .

Ignition switched off.

Test sequence

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

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

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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.
Remove rear seat bench →
- 72 - SEAT - FRAMES
- 72 - SEAT - FRAMES for BODY INTERIOR - CABRIOLET
.

Fig 4: Removing Cover Bolts For Locking Flange

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Unbolt cover for left locking flange - arrows -.

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

Fig 5: Pulling Fuel Line Off From Left Locking Flange

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Pull fuel line - arrow - off from left locking flange, by pressing release button.

Fig 6: Connecting Adapter V.A.G 1318/17-1 To Disconnected Fuel Line And Hold It In A Measuring Container

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Connect adapter V.A.G 1318/17-1 to disconnected fuel line and hold it in a measuring container.
Press switch on remote control for 15 seconds.

Fig 7: 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:

Install fuel line.