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Old 03-26-2020, 03:13 PM
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wpoll wpoll is offline
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Location: South Island, New Zealand
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Originally Posted by andrewwynn View Post
And does it have a pressure sensor for fuel? I donít think any of the petrol models do but I would not be surprised if the diesel model does.
Sure does - the DDE modulates the output of the HPFP to raise and lower the fuel rail pressure and uses a fuel rail pressure sensor as part of the control loop. With fuel pressures up to 1650 bar, monitoring the exact pressure is pretty important.

I've not studied the M54 fuel system. I know it only runs at around 3.5 bar max pressure but assume that there's no actual pressure control beyond a simple mechanical regulator in the fuel line somewhere and therefore not likely any sensor to monitor the fuel pressure.
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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