A8 Quattro Sedan V8-4.2L (BGK) (2006)
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Fuel Pressure: Testing and Inspection
Fuel Pressure Regulator and Residual Pressure, Checking
Fuel Pressure Regulator and Residual Pressure, Checking
Special tools, testers and auxiliary items required
‹› Hose clamps up to 25 mm dia. (3094)
‹› Pressure gauge for K-Jetronic (V.A.G 1318)
‹› Adapter (V.A.G 1318/26)
Conditions
‹› Fuel Pump (FP) Relay OK.
‹› Fuel Pump (FP) OK.
‹› Fuel filter OK.
‹› Battery voltage at least 11 Volts.
‹› Parking brake engaged.
‹› Vehicles with automatic transmission: Selector lever in position "P" or "N".
‹› Electrical consumers switched off (Radiator fan must not run during test).
‹› Air conditioning system switched off.
‹› Ignition switched off.
CAUTION!
Fuel system is under pressure! Before loosening hose connections or opening the test connection (for fuel pressure testing), place rags
around the connection area. Then release pressure by carefully loosening the connection.
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Briefly open fuel filler cap (pressure release).
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Remove engine cover.
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Cover threaded connections that hold fuel pressure (fuel supply) with a shop rag.
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Open fuel supply line threaded connection - arrow - and catch escaping fuel using a shop rag.
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Install fuel injection pressure gauge (V.A.G 1318) with appropriate adapters between fuel supply line and fuel rail line.
