Passat L4-1.8L Turbo (AWM) (2004)
Fuel Pressure: Specifications
Specified value: about 3.5 bar positive pressure
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Disconnect vacuum hose from fuel pressure regulator (arrow). Fuel pressure should rise to about 4.0 bar positive pressure.
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Observe pressure drop on pressure gauge for this. After 10 minutes at least 2.0 bar positive pressure should still be present.