Checking Fuel Pressure Regulator and Holding Pressure - Page 4962
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Remove fuse No. 28 (fuel pump) from fuse holder.
CAUTION: Fuel system is under pressure. Before opening the system place a cloth around the connection. Then release pressure by carefully loosening
the connection.
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Pull off supply line -1 - and collect leaking fuel with a cloth.
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Connect pressure gauge V.A.G1318 to fuel supply line and to fuel rail with adapters V.A.G 1318/10, V.A.G 1318/11 and hose adapter V.A.G
1318/16.
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Open shut-off tap on pressure gauge. Lever points in direction of flow - arrow -.
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Refit fuse 28 (fuel pump) in fuse holder.
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Start engine and run at idling speed.
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Measure fuel pressure.
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Specification: approx. 2.5 bar