New Beetle L4-1.8L Turbo (AWV) (2005)
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Disconnect vacuum hose -1- from fuel pressure regulator -2-. Fuel pressure should rise to approx. 3.0 bar positive pressurize.
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Switch ignition off.
NOTE: If fuel should escape at the vacuum connection of the pressure regulator, replace fuel pressure regulator.
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Check for proper seal and residual pressure. Observe pressure drop on pressure gauge for this. After 10 minutes at least 2.0 bar positive pressure
should still be present.
If residual pressure falls below 2 bar positive pressure:
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Start engine and let run at idle.
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Wait until pressure has built up, and 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 on pressure gauge.
If pressure does not drop:
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Test check-valve of Fuel Pump (FP). Fuel Pump (FP), checking. See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing
and Inspection/Fuel Pump, Checking - I
If pressure drops again:
