A8 Quattro Sedan V8-4.2L (BGK) (2006)
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Install pressure gauge (VAG1318) between supply line and fuel rail pipe using adapters (VAG1318/15) (6), (VAG1318/7).
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Open shut-off valve of pressure gauge. The lever points in the direction of flow.
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Start engine and let run at idle.
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Measure fuel pressure.
Specified value: approx. 3.5 bar positive pressure.
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Disconnect vacuum hose (- arrow -) from fuel pressure regulator.
