Volkswagen Passat 1995 Official Factory Repair Manual page 1963

Multiport fuel injection and ignition system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU07.24.1
- Check for leaks and residual pressure by
watching pressure drop on gauge.
After 10 minutes there must be a residual
pressure of at least 2 bar (29 psi).
If the residual pressure drops below 2 bar (29
psi):
- Start engine and run at idle speed.
- After pressure has built up switch ignition off and
simultaneouslyclamp-off return line (with blue
arrow) on fuel rail.
- Watch pressure drop on gauge.
If the pressure does not drop:
- Replace fuel pressure regulator.
If the pressure drops again:
- Check fuel pump check valve.
Repair Manual, 2.8 Liter VR6 2V Engine
Mechanical, Engine Code(s): AAA, Repair Group
20
- Check hose connections, O-rings on fuel rail and
fuel injectors for leaks.
- Check pressure gauge for leaks.
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12/6/2004