A4 Quattro Cabriolet V6-3.0L (BGN) (2005)
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Remove air filter housing (arrows).
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Disconnect electrical harness connector -1- at Mass Air Flow (MAF) sensor.
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Remove air guide hose -2- together with Mass Air Flow (MAF) sensor.
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Remove bolts -4- and -5- at left cylinder head cover.
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Disconnect electrical harness connectors -1- to -3- and -6-.
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Remove ignition coils (arrows).
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Remove bolts -5- and -6- at right cylinder head cover.
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Disconnect electrical harness connectors -1- to -4-.
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Remove ignition coils (arrows).
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Using 3122B spark plug removal tool, remove spark plugs.
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Remove all harness connectors to injectors.
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Open throttle fully.
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Test engine compression using VAG1381 or VAG1763 compression tester.
Note: Using VAG1381 or VAG1763 Compression Tester:
Go to Operating instructions
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Activate starter until no further pressure increases are indicated by VAG1381 or VAG1763 compression tester.
Compression values