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Home >> BMW >> 2013 >> X6 50i >> Repair and Diagnosis >> External Pages >> Different car >> Section 1020 (Fuel System - Repair (N54)) >> Fuel Pump With Drive And Line >> 13 31... Notes on fuel pressure check (reference pressure: environment) >> Feature of this version with ambient pressure >> Description of operation >> Description of operation: pressure retaining function

Description of operation: pressure retaining function

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

The pressure regulator closes when the engine is at a standstill and the ignition key is in position 0. The fuel pressure in the delivery line is retained over an extended period. A non-return valve closes in the fuel pump. These measures help to retain the fuel pressure in the fuel system. Extended starting times are thus avoided.

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