Golf GLS L4-2.0L (AVH) (2002)
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Wait until pressure has risen, and then switch off ignition. Simultaneously close shut-off valve of pressure gauge (lever perpendicular to direction
of flow -arrow-).
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Observe pressure drop on pressure gauge.
If pressure does not drop:
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Test check-valve of Fuel Pump (FP), Fuel Pump (FP), checking. See: Computers and Control Systems/Testing and Inspection/Component Tests
and General Diagnostics/Fuel Pump, Checking
If pressure does drop again:
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Open stop valve of pressure gauge (lever in direction of flow -arrow-).
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Start engine and let run at idle.
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Wait until pressure has risen, and then switch off ignition. Simultaneously pinch return hose tightly together.
If pressure does not drop:
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Replace fuel pressure regulator, item 1.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If pressure does drop again:
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Check whether line connections, O-rings in fuel rail, and fuel injectors are properly sealed.
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Check whether pressure gauge is properly sealed.
NOTE:
Before removing pressure gauge, put cleaning rags back around line connection which is to be disconnected.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes