Leon Mk2
Checking components
Checking fuel pressure regulator and holding pressure
The fuel pressure regulator controls the fuel pressure dependent upon intake manifold pressure. |
Special tools, workshop equipment, test and measuring appliances and auxiliary items required
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→ Connections on fuel rail The following pipes/hoses are connected to the fuel rail:
Warning!
The fuel supply pipe -1- and the pipe from activated charcoal filter -3- must not be interchanged. Danger of damaging engine! |
Note: For reasons of safety, the voltage supply to the fuel pump relay is interrupted through the removal of fuse No. 14 because otherwise opening the driver's door would start the fuel pump. Test sequence |
Warning!
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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If the specification is not obtained:
=> Rep. Gr. 20; Removing and installing parts of fuel system; checking fuel pump If the specification is obtained:
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If the holding pressure drops below 2 bar:
If the pressure drops again:
=> Rep. Gr. 20; Removing and installing parts of fuel system; checking fuel pump If the pressure does not drop: |
If the pressure does not drop:
If the pressure drops again:
Note: Before removing the pressure gauge, remove fuse No. 14 and wrap a cloth around the connections to be loosened. |