Eos (1F7) V6-3.2L (BUB) (2008)
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Make sure the drain is closed and the shut off valves are open.
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Start the engine and run at idle speed.
‹› If the engine does not start, activate the fuel pump with output Diagnostic Test Mode (DTM). Refer to => [ Function and Voltage Supply,
Checking ] See: Testing and Inspection.
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Check the fuel pressure on the (VAS 6550). Specified value: 3.8 to 4.2 bar.
If the fuel pressure is OK, check the residual pressure.
If the specification is exceeded:
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Check the fuel return line between the fuel filter and the flange for possible restrictions (kinks) or blockages.
If no malfunction can be found:
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If the fuel pressure regulator is faulty, replace the fuel filter.
If the specification is not obtained:
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Check the fuel lines for possible restrictions (kinks) or blockages.
If no malfunction can be found:
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Replace the fuel filter.
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Repeat the test.
If the specified value is again not obtained:
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Replace the fuel delivery unit if the fuel pump is faulty. Refer to => [ Fuel Delivery Unit ] See: Service and Repair.
If the specified value is not reached, check the residual pressure:
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Watch the pressure decrease on the (VAS 6550). After 10 minutes the pressure must not drop below a 3.0 bar decrease.
If the pressure drops further:
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Start the engine and run at idle speed.
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Turn the ignition off and close the (VAS 6550) shut off valve - B - immediately.