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Home >> Volkswagen >> 2018 >> Beetle S, 2D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 34 (Fuel Supply [CBTA, CBUA, CCTA, CBFA, CPLA, CPPA, CPRA, CPKA, DDSA] (Convertible)) >> 20 Fuel Supply >> Fuel Pump >> Transfer Fuel Pump -G6-, CHECKING >> Residual Pressure, Checking >> If the Pressure no Longer Decreases (Leak on the Engine Side):

If the Pressure no Longer Decreases (Leak on the Engine Side):

WARNING: This page is about a different variant/trim than selected.
NOTE:

Look for leaks on the engine-side. Repeat the residual pressure check. Close the shut-off valve -A- this time to determine if there actually is a leak on the engine side.

-- If there is a leak on the engine-side, check the fuel pipes and high pressure pump for leaks.

If No Malfunction Is Found Check the Fuel Injectors for Leaks.

-- Remove the spark plugs. Open the shut-off valves -A and B-. Activate the fuel pump with the output diagnostic test mode.

-- Check through the spark plug hole if fuel is collecting on the piston crown due to a leaking fuel injector.

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