Volkswagen Passat 1995 Official Factory Repair Manual page 1715

Motronic Fuel Injection and Ignition system, component layout
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Fuel pressure regulator and
residual pressure, checking
The fuel pressure regulator controls fuel
pressure relative to Manifold Absolute
Pressure .
Fuel pump delivery rate OK,
checking:
Repair Manual, 2.8 Liter VR6 2V
Engine Mechanical, Engine Code(s):
AAA, Repair Group 20
Note:
To prevent fuel spray when loosening
connections, wrap a lint free cloth
around the connection.
- Remove fuel rail plug -1- and
connect pressure gauge VAG 1318
using adaptor VAG 1318/1. The shut-
off lever on the pressure gauge must
be closed (lever -arrow- at right
angles to direction of flow).
- Start engine and let idle.
- Check fuel pressure.
Specification: Approx. 3.5 bar
- Pull vacuum hose off fuel pressure
regulator on intake manifold upper
part -arrow-. The fuel pressure must
increase to approx. 4.0 bar.
- Switch off ignition.
- Check for leaks and residual
pressure by observing pressure drop
on gauge. After 10 minutes there
must be a residual pressure of at
least 2.5 bar.
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6/12/2004