Jetta Sedan L5-2.5L (CBTA) (2009)
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Observe the pressure drop (engine side) on the (VAG 1318).
If the pressure drops again:
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Check the line connections, O-rings on the fuel rail and fuel injectors for leaks. Refer to --> [ Fuel Injectors, Checking Injection Quantity and for
Leaks ] See: Fuel Injector/Testing and Inspection.
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Check the (VAG 1318) for leaks.
‹› Before removing the (VAG 1318), place clean clothes around the connection which is to be disconnected.
If the pressure does not drop:
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Check the line connections to the fuel tank and check valve of the fuel pump. Refer to --> [ Fuel Pump Check Valve, Checking ] See: Testing and
Inspection/Fuel Pump, Checking.
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If the check valve is OK, replace the fuel filter/pressure regulator.
‹› From October 2005, the fuel pressure regulator is integrated in the fuel filter and cannot be replaced.
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Bleed the fuel system. Refer to --> [ Fuel System, Bleeding ] See: Service and Repair/Procedures.