IrvesBMW Posted October 22, 2024 Share Posted October 22, 2024 Hello, I have replaced the defective high-pressure fuel pump (HPFP) on a 2009 BMW E90 N47 320D with 209,000 km. I have changed the HPFP twice owing to persistent hesitation and prolonged cranking during starts. I want guidance and help. Thank you in advance. Quote Link to comment Share on other sites More sharing options...
TechWhiz Posted October 22, 2024 Share Posted October 22, 2024 Additional information is required. What was the first failure mode? Were authentic, used, or aftermarket pumps installed? Has the low-pressure fuel supply been inspected? Has the injector leak-off been inspected? Quote Link to comment Share on other sites More sharing options...
BEERMAN Posted October 22, 2024 Share Posted October 22, 2024 The high-pressure fuel pump (HPFP) malfunctioned and was replaced with a pre-owned pump from eBay on two occasions. Replaced and programmed injectors - used eBay Thoroughly cleaned the whole fuel system. Replaced the in-tank fuel pump located at the rear right of the vehicle, while the left pump was reinstalled as it was functioning well. Fuel pressure has not been assessed using the OBD reader, nor has a fuel leak been investigated. I will review YouTube videos about the latter two topics. Thank you for your prompt reply. Quote Link to comment Share on other sites More sharing options...
BEERMAN Posted October 22, 2024 Share Posted October 22, 2024 Immediate Data Acquisition OBD standards applicable to vehicles... European On-Board Diagnostics Placement of oxygen sensors 02S11 Fuel rail pressure 4457.00968 pounds per square inch 0-95050.4814 Equivalence ratio (lambda) (ba... More 0 to 1.999 Oxygen sensor voltage (bank 1... More 8. 0.836 volts 0 to 7.999 Directed EGR 2A 1 litre. Segment of real-time data extracted from ODB reader Quote Link to comment Share on other sites More sharing options...
TechWhiz Posted October 22, 2024 Share Posted October 22, 2024 Presume the gasoline system was contaminated with metal filings from the pump. Have you performed any modifications to the fuel rail? Quote Link to comment Share on other sites More sharing options...
IrvesBMW Posted October 22, 2024 Author Share Posted October 22, 2024 The fuel rail was changed last year with a pre-owned rail purchased on eBay. Quote Link to comment Share on other sites More sharing options...
IrvesBMW Posted October 22, 2024 Author Share Posted October 22, 2024 The fuel system was contaminated with metal filings, which were subsequently cleaned and removed. Later, an error code connected to the glow plug module appeared, prompting me to replace it with a used part acquired from eBay. The vehicle had an Auto Start/Stop fault code prior to the failure of the HPFP. Quote Link to comment Share on other sites More sharing options...
TechWhiz Posted October 22, 2024 Share Posted October 22, 2024 Was the rail changed subsequent to the pump failure or before to it? Quote Link to comment Share on other sites More sharing options...
DreamWeaver Posted October 22, 2024 Share Posted October 22, 2024 What is the rationale for using two accounts? You installed the new pump and did not reinstall the old one. Quote Link to comment Share on other sites More sharing options...
BEERMAN Posted October 22, 2024 Share Posted October 22, 2024 Rail substituted after pump malfunction The pump was replaced twice due to error code 4560, indicating a plausibility issue with the rail fuel pressure, accompanied with delay and prolonged cranking during starts. The same codes appeared after the replacement of the second high-pressure fuel pump. Quote Link to comment Share on other sites More sharing options...
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