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The BMW Range
5 Series
o2 sensor Test
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<blockquote data-quote="jarance" data-source="post: 744599" data-attributes="member: 21"><p>High fuel consumption could be due to many thing. You have change almost everything to be change.</p><p></p><p>Do a engine compression to check whether there is leakage due to worn out valve seal, piston rings etc.</p><p></p><p>Another thing to consider is to check the fuel pressure at the fuel manifold. Ensure that it is 3.5bar.</p><p></p><p>I have change my fuel pump (not original) to work at 4.0 bar and the fuel filter pressure regulator give a constant</p><p>pressure. It manage to bring my "fuel consumption" back to normal (10.2L/Km). Used to be 14L/Km before I replace the pump.</p><p></p><p>Previously, I got the OEM pump from Auto Bavaria spare part shop. After using for 3 months, I change the pump with a pump</p><p>that I bought from aliexpress.</p></blockquote><p></p>
[QUOTE="jarance, post: 744599, member: 21"] High fuel consumption could be due to many thing. You have change almost everything to be change. Do a engine compression to check whether there is leakage due to worn out valve seal, piston rings etc. Another thing to consider is to check the fuel pressure at the fuel manifold. Ensure that it is 3.5bar. I have change my fuel pump (not original) to work at 4.0 bar and the fuel filter pressure regulator give a constant pressure. It manage to bring my "fuel consumption" back to normal (10.2L/Km). Used to be 14L/Km before I replace the pump. Previously, I got the OEM pump from Auto Bavaria spare part shop. After using for 3 months, I change the pump with a pump that I bought from aliexpress. [/QUOTE]
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