Rabbit L5-2.5L (CBUA) (2008)
If specified value is achieved:
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Switch off ignition.
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Now check for leaks and residual pressure (entire system). Observe pressure drop on pressure gauge.
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After 10 minutes there must be a residual pressure of at least 3.0 bar.
If the holding pressure drops below 3 bar:
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Start engine and run at idle speed.
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Wait until pressure has built up, then switch off ignition. Simultaneously close shut-off valve of pressure gauge (lever perpendicular to direction of
flow) - arrow -.
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Observe pressure drop (engine side) on pressure gauge.
If the pressure drops again:
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Check line connections, O-rings at fuel distributor and fuel injectors for leaks. See: Fuel Injector/Testing and Inspection
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Check pressure gauge for leaks.
NOTE: Before removing pressure gauge, put cleaning rags around line connection which is to be disconnected.
If pressure does not drop:
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Check line connections to fuel tank and check valve of Fuel Pump (FP).
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If check valve is OK, replace fuel pressure regulator.
NOTE: From October 2005, the fuel pressure regulator is integrated in the fuel filter and cannot be replaced.
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Bleed fuel supply system.