Get Mixture preparation - injection -> 2.1 Checking injectors Guide for Volkswagen Touareg SUV First Generation (2002-2010)

Touareg 2003 ➤

8-cylinder injection engine - Edition 11.2011

2

Checking components

Checking injectors ⇒ page 139 .

Checking fuel pressure regulator and holding pressure

⇒ page 142 .

2.1

Checking injectors

Checking injectors for leaks and quantity injected ⇒ page 139

Special tools and workshop

equipment required

♦ Remote control for V.A.G

1348 -V.A.G 1348/3A- with

adapter cable - Phaeton -

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

♦ Injection rate tester -V.A.G

1602-

♦ Adapter cable -V.A.G

1348/3-2-

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2.1.1

Checking injectors for leaks and quanti‐

ty injected

•

The fuel pressure must be in order, checking ⇒ page 142 .

2. Checking components

139

lk

Touareg 2003 ➤

8-cylinder injection engine - Edition 11.2011

Checking for leaks

WARNING

Fuel supply lines are under pressure! Wear eye protection and

gloves to avoid injuries and skin contact. Before loosening

hose connections, wrap a cloth around the connection. Then

release pressure by carefully pulling hose off connection.

– Remove complete fuel rail (fuel supply line remains connec‐

ted) ⇒ page 133 .

– Remove fuse holder cover.

– Pull fuel pump relays -1- and -2- from their sockets.

– Connect remote control -V.A.G 1348/3- with adapter line -

V.A.G 1348/3-3- -arrow- to connection of fuel pump relay for

right fuel delivery unit.

– Now connect second connection of adapter cable -

V.A.G 1348/3-3- to connector connection -arrow- for fuel pump

relay for left fuel delivery unit.

140

Rep. gr.24 - Mixture preparation - injection

Touareg 2003 ➤

8-cylinder injection engine - Edition 11.2011

– Connect crocodile clip of remote control -V.A.G 1348/3- to

positive connection -1-.

– Operate remote control -V.A.G 1348/3- .

If fuel pump runs:

lk

– Check injectors for leaks (visual check). No more than 1 to 2

drops per minute must escape from each valve when fuel

pump is running.

If the fuel loss is greater:

– Renew defective injector.

Pay attention to the following when installing the injectors:

♦ Renew O-rings on all injectors and lightly moisten with clean

engine oil.

♦ Insert injectors vertically and in the correct position into the fuel

rail and secure with retaining clips.

♦ Fit fuel rail with secured injectors onto intake manifold and

press in evenly.

Checking quantity injected

•

Fuel pump relays and fuses 13 and 14 are fitted in their sock‐

ets.

– Connect test box -V.A.G 1598/31- to engine control unit.

– Bridge test box sockets 1 and 65 using adapter cable from

auxiliary measuring set -V.A.G 1594- .

– Insert the injector to be checked into injection rate tester meas‐

uring glass -V.A.G 1602- .

– Connect a contact of injector to be tested to engine earth using

auxiliary cables from auxiliary measuring set -V.A.G 1594- .

– Connect second injector contact to remote control -

V.A.G 1348/3- using adapter cable -V.A.G 1348/3-2- .

2. Checking components

141

Touareg 2003 ➤

8-cylinder injection engine - Edition 11.2011

– Connect crocodile clip of remote control -V.A.G 1348/3- to

battery positive (+) -1- in engine compartment.

– Switch on ignition.

– Operate remote control -V.A.G 1348/3- for 30 seconds.

– Repeat check on other injectors. Use new measuring beakers.

– Switch off ignition.

– After all injectors have been activated, place measuring beak‐

ers on a level surface and compare the quantity injected.

Specification: 95..0.115 ml per injector

If the measured values of one or more injectors are above or be‐

low the prescribed specifications:

– Renew defective injector.

Install injectors in reverse order. In the process, note the follow‐

ing:

♦ Renew O-rings on all injectors and lightly moisten with clean

engine oil.

♦ Insert injectors vertically and in the correct position into the fuel

rail and secure with retaining clips.

♦ Fit fuel rail with secured injectors onto intake manifold and

press in evenly.

2.2

Checking fuel pressure regulator and

holding pressure

lk

Special tools and workshop equipment required

♦ Pressure gauge -V.A.G 1318-

♦ Adapter set -V.A.G 1318/7-

♦ Adapter set -V.A.G 1318/10-

♦ Adapter set -V.A.G 1318/13-

♦ Spring-type clip pliers -VAS 6340-

142

Rep. gr.24 - Mixture preparation - injection

Mixture preparation - injection -> 2.1 Checking injectors for Your Volkswagen Touareg SUV First Generation (2002-2010)

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