Touareg 2 V6-3.6L (BHK) (2008)
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Check connections to fuel rail and high pressure pump for leaks. Refer to --> [ Fuel Rail with High Pressure Pump and Injectors Assembly
Overview ] See: Service and Repair/Fuel Rail with High Pressure Pump and Injectors Assembly Overview.
If no malfunction can be found:
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Replace high pressure pump.
If Pressure No Longer Drops Now:
(Leak on fuel tank side)
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Check fuel filter for leaks.
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Check fuel line to sensor flange --> [ (Item 15) Flange ] See: Fuel Tank/Service and Repair/Removal and Replacement/Fuel Tank and Components
Assembly Overview for leaks.
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Check all additional fuel lines in fuel tank for leaks.
If no malfunctions are found on fuel line:
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Pressure relief valve in fuel delivery unit flange faulty.
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Replace sensor flange with pressure relief valve --> [ (Item 15) Flange ] See: Fuel Tank/Service and Repair/Removal and Replacement/Fuel Tank
and Components Assembly Overview.
Delivery Quantity, Checking
Test Sequence
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Read safety precautions before beginning work. Refer to --> [ Safety Precautions ] See: Service Precautions/Vehicle Damage Warnings/Safety
Precautions.
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Observe the rules for cleanliness. Refer to --> [ Clean Working Conditions ] See: Service Precautions/Vehicle Damage Warnings/Clean Working
Conditions.
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Fold rear seat bench forward. On vehicles from 12.06, rear seat bench must be removed.
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Cut open carpet on right side from point - A - to point - B - in pre-cut area - arrow -.
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Remove the nuts - 1 - on the right side of the fuel delivery unit cover. If necessary, remove backrest support - 2 - or mounting bracket.