volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Checking Fuel Pressure Regulator and Holding Pressure|Page 4969 > < Checking Fuel Pressure Regulator and Holding Pressure|Page 4967
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Pull supply hose -1 - off fuel filter outlet.

NOTE:  Press locking ring inward to release fuel lines.

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Connect pressure gauge V.A.G1318 to fuel filter outlet with adapters V.A.G 1318/23 and V.A.G 1318/17.

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Close pressure gauge shut-off tap (lever at right angles to through flow direction - position - B -).

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Operate remote control V.A.G1348/3A for approx. 10 seconds to fill fuel filter and to build up a system pressure of approx. 4 bar.

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Observe pressure drop on gauge.

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After 30 minutes, pressure must not drop below 3.2 bar.

If the pressure drops further:

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Check line connections for leaks.

If no fault in lines is detected:

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Replace fuel pressure regulator.

Checking Fuel Pressure Regulator and Holding Pressure|Page 4969 > < Checking Fuel Pressure Regulator and Holding Pressure|Page 4967