Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Fuel Pressure Check Valve: Testing and Inspection
Checking pressure retaining valve
From the gravity valve direction, the pressure retaining valve is open in both directions of flow -arrow -1-.
From the junction piece EVAP canister purge regulator valve direction it is only open in one direction of flow -arrow -2-.
