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Home >> BMW >> 2011 >> Z4 35is >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 23 (Fuel System - Repair (N52)) >> 1331 Fuel Pump With Drive And Line >> 13 31... Notes on fuel pressure check (reference pressure: environment) >> Description of operation

Description of operation

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The control function of the fuel pressure regulator must be guaranteed under all operating conditions. The fuel pump must always be able to generate a higher fuel pressure than the pressure regulated by the pressure regulator.

The injection rate is adjusted by means of the injection time; the injection time is controlled by the DME.

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