Volkswagen Phaeton 2003, Руководство по ремонту

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– Separate coupling -1- from fuel supply line (black) -2- and col‐
lect escaping fuel in a cloth.
Note
Push in button on hose coupling to do this.
– Connect pressure tester - V.A.G 1318- with adapter -
V.A.G 1318/17- on hose coupling -1- fuel rail.
– Now screw pressure tester - V.A.G 1318- to adapter -
V.A.G 1318/9- and adapter - V.A.G 1318/17- and connect this
assembly to supply line -2-.
– Open pressure tester shut-off tap. The handle points in direc‐
tion of flow.
– Start engine and run at idling speed.
– Measure fuel pressure. Specification: approx. 3.5 bar.
– Pull vacuum hose off fuel pressure regulator -arrow-. The fuel
pressure must increase to approx. 4.0 bar.
If the specification is not attained:
– Check delivery rate of fuel pumps
⇒ page 139 Checking fuel
pumps.
If specification is attained:
– Switch off ignition.
– Now check for leaks and holding pressure. Do this by observ‐
ing pressure drop on gauge. After 10 minutes, there must be
a residual pressure of at least 3.0 bar.
If the holding pressure drops below 3 bar:
– Start engine and run at idling speed.
When the fuel pump has built-up the pressure again:
Phaeton 2003 ➤
6-cylinder injection engine - Edition 02.2014
2. Checking components
165