TT L4-1.8L Turbo (BEA) (2004)
If pressure does not drop now:
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Replace fuel pressure regulator
If pressure drops again:
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Check wire connections, O-rings at fuel rail and fuel injectors for proper seal.
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Check whether pressure gauge is properly sealed.
NOTE: Before disconnecting pressure gauge, release pressure by opening shut-off valve. Hold a container in front of connection for this.