TT Quattro Coupe L4-1.8L Turbo (BEA) (2003)
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Remove fuel supply hose -1- (with white marking) from supply line.
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Connect VAG 1318 using adapters 1318/7 and 1318/17 (2 pieces) at supply line.
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Open valve of pressure gauge. Lever points in direction of flow.
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Start engine and let run at idle.
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Measure fuel pressure.
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Specified value: approx. 2.5 bar positive pressure
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Disconnect vacuum hose at fuel pressure regulator.
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Fuel pressure must rise to approx. 3.0 bar positive pressure.
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Switch ignition off.
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Check for proper seal and residual pressure by observing pressure drop on pressure gauge.
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After 10 minutes, there must be at least 1.5 bar positive pressure
If residual pressure sinks below 1.5 bar positive pressure:
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Start engine and let run at idle.