B - Pressure Test In The Fuel Supply Line
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- Connect the measuring setup as if measuring the delivery quantity.
-- Turn the Pressure Tester Kit:VAS6550 -1- on by pressing the On/Off button.
-- Open the shut-off valves -A and B-.
- The levers point in the direction of flow.
CAUTION:
Risk of fuel leak.
- The shut-off valve -C- must be closed.
- The lever is perpendicular to the direction of flow.
-- Push the remote control switch: the fuel pump starts running.
-- If the fuel flows without bubbles, close the drain -B-, so that the fuel pressure increases.
- The lever is perpendicular to the direction of flow.
-- Read the fuel pressure in the Pressure Tester Kit:VAS6550 :
- Specified value: 5.0 to 8.0 bar (72.5 to 116 psi)
If Specified Value Is Obtained, Although the Fuel Delivery Unit Is Not OK.
- The fuel filter is clogged or the fuel supply line is kinked
If the Specification Is Not Attained:
- Fuel delivery unit or fuel pressure regulator (on the fuel filter) is faulty.