A8L Quattro Sedan W12-6.0L (BSB) (2005)
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‹› Vehicles with engine code BSB are without the fuel return line - 2 - in the illustration.
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Disconnect vacuum hose from fuel pressure regulator.
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Remove bolts from fuel rail - arrows - (: 10 Nm).
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Pull fuel rail (on transmission side) with injectors upward uniformly from intake manifold and set aside in engine compartment on a clean cloth.
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Reconnect fuel supply line - 1 - and fuel return line - 2 - to fuel rail.
‹› Vehicles with engine code BSB are without the fuel return line - 2 - in the illustration.
Injectors, checking for leaks
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Insert fuel injector to be tested into measuring container of fuel injection quantity tester (V.A.G 1602).
