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Checking Pressure Retention Valve The pressure retention valve is opened in both through-flow directions from the gravity valve/pressure retention Fig. 6: Checking Pressure Retention Valve It is opened only in one through-flow direction from the EVAP system/solenoid valve junction piece (arrow -2- Checking direction of valve flow. See CHECKING DIRECTION OF VALVE FLOW . Checking direction of valve flow A. Union 1 1: z Flow in both directions z Union -2- is closed B. Union 1 - 2: z Flow in both directions z Union - 3 is closed C. Union 1 2: z Flow in only one direction z Union -3- is closed z Valve must close when a vacuum is applied to union -1- NOTE: Before installing vent valve remove cap from fuel tank. NOTE: The following list refers to items in Fig. 6 .
2003 Volkswagen New Beetle GLS 1998-2004 ENGINE Fuel Supply - 2.0L (AEG, AVH, AZG, BDC, BEV & BGD)
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