New Beetle L4-2.0L (AVH) (2005)
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Pull vacuum hose -1 - off fuel pressure regulator - 2 -.
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Fuel pressure must increase to approx. 3.0 bar
If the specification is not obtained:
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Check quantity supplied by fuel pump.
If the specification is obtained:
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Switch off ignition.
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Check for leaks and holding pressure by observing pressure drop on gauge.
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After 10 minutes, there must be a residual pressure of at least 2.0 bar.
If the holding pressure drops below 2 bar:
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Start engine and run at idling speed.
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Switch ignition off after pressure has built up. At same time close pressure tester V.A.G1318 shut-off tap (handle at right angles to through-flow
direction - arrow -).
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Observe pressure drop on gauge.
If the pressure does not drop:
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Check fuel pump non-return valve.
If the pressure drops again: