Passat (B3)
Motronic injection and ignition system
Checking fuel pressure regulator and holding pressure
The fuel pressure regulator controls the fuel pressure dependent upon intake manifold pressure. Special tools, testers and auxiliary items
Test conditions
=> Repair group 20, removing and installing parts of the fuel system, checking fuel pump Note: To prevent fuel spray when loosening connections wrap a cloth around the connection. Test sequence |
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If the holding pressure drops below 2 bar:
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If the pressure drops again:
=> Repair group 20, removing and installing parts of the fuel supply system, checking fuel pump If the pressure does not drop: |
If the pressure does not drop:
If the pressure drops again:
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