A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Attach adapter piece V.A.G 1318/17-1 to return line.
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Disconnect adapter piece using hose clamp 3094.
NOTE: Do not attach hose clamp 3094 directly to fuel line - Danger of damage
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Start engine and run at idling speed.
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Allow pressure to build up, then switch off ignition. At same time close cut off valve on pressure gauge V.A.G 1318 (valve lever at right angles to
direction of flow -arrow-).
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Observe pressure drop on pressure gauge.
If the pressure drops again:
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Check fuel pump non return valve.
If the pressure now does not drop:
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Replace fuel filter.
Assembly is performed in the reverse order, note the following while doing so:
NOTE: Before removing the pressure gauge, release the fuel pressure by opening the cut off valve. When doing this hold a container over the
connection.
Vehicles up to 06.03
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Tighten union nut for fuel supply line -1- to 22 Nm.