Jetta Sedan L5-2.5L (CBTA) (2009)
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Open the shut off valve on the (VAG 1318). The lever points in the direction of flow.
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Bleed the fuel system. Refer to --> [ Fuel System, Bleeding ] See: Service and Repair/Procedures.
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Start the engine and run at idle speed.
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Measure the fuel pressure.
Specified value: approximately 4.0 bar positive pressure
If the Specification is Not Obtained:
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Switch off the ignition.
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Check the delivery quantity of the fuel pump. Refer to --> [ Delivery Quantity, Checking ] See: Testing and Inspection/Fuel Pump, Checking.
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If the fuel pump 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.
If the Specified Value is Achieved:
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Switch off the ignition.
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Now check for leaks and residual pressure (entire system). Observe the pressure drop on the (VAG 1318).
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 the engine and run at idle speed.
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Wait until pressure has built up, then switch off the ignition. Simultaneously close the shut off valve on the (VAG 1318) (lever perpendicular to
direction of flow) - arrow -.