Beetle L4-2.0L (AEG) (2000)
Fuel Pump Check Valve: Testing and Inspection
With Manufacturer's Scan Tool
Fuel Pump Check Valve, Checking
WARNING!
Fire hazard! Do NOT have anything in the area that can ignite gasoline!
Requirements
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VAG1348/3A Remote control is still connected.
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VAG1318 Pressure gauge s still connected.
Test sequence
NOTE: This procedure simultaneously checks for leaks all the fuel supply connections between the fuel delivery unit and the VAG1318 pressure gauge
connection.
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Close pressure gauge cut-off tap.
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Lever at right angles to direction of flow -arrow-
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Operate remote control at short intervals, until a pressure of approx. 3 bar has built up.
WARNING!
Danger of fuel spray when opening the cut-off tap, hold container over the pressure gauge free connection.
If too much pressure builds up:
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Lower excess pressure by carefully opening cut-off tap.
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Watch pressure drop on gauge.
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After 10 minutes the pressure must not drop below 2.5 bar.
If pressure continues dropping:
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Check line connections for leaks.
If OK:
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Fuel pump malfunctioning, replace fuel delivery unit.