A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Disconnect fuel supply line -1- and expose.
NOTE: Disregard item no. -2-.
Vehicles as of 07.03
WARNING: Fuel system is under pressure. Before opening system, place rags around the connection point. Then release pressure by carefully
loosening connection.
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Unscrew fuel hose from connection on fuel rail pipe. To do so, counterhold using an open-end wrench at each hex head -1- and -3- and unscrew
union nut -2-.
Continuation for all vehicles
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Connect pressure gauge V.A.G 1318 using adapters 1318/6 and 1318/7 to feed line.
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Open shut-off valve of pressure gauge. Lever points in direction of flow.
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Start engine and run at idle.
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Measure fuel pressure.
Specified value: approx. 4.0 bar excess pressure
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Switch ignition off.
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Check leak tightness and holding pressure by watching gauge indicator fall.
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After 10 minutes the remaining pressure should be at least 2.5 bar excess pressure
If the holding pressure drops below 2.5 bar: