stevenkeyte Posted November 21, 2024 Share Posted November 21, 2024 I own a 2008 BMW 520d N47, to my knowledge. Recently, I have spent in excess of £4,500 on a range of repairs, including: Substituting gaskets Replacing the gearbox fluid Modifying ECU modules Substituting the timing chain Draining the DPF (I have been advised that it was remapped and the DPF was removed, resulting in blockage, therefore necessitating the draining) The vehicle exhibits an issue between 1500 and 2000 RPM, characterised by fluctuating revolutions and hesitation during acceleration. I have conducted mechanical testing on all components, including: Turbocharger Turbo actuator Exhaust Gas Recirculation (EGR) Throttle body and all vacuum lines, which underwent smoke testing. Intercooler Notwithstanding all these examinations, the problem endures and stays unaddressed. The garage has now indicated that it must be an electrical problem. Any recommendations, please? Quote Link to comment Share on other sites More sharing options...
paulh2602601 Posted November 21, 2024 Share Posted November 21, 2024 They said that it was mapped, but the DPF was installed. This has now been overhauled, and the software has been upgraded. Updating the program likely restores it to factory settings. I will get a competent mapper to examine it. Quote Link to comment Share on other sites More sharing options...
stevenkeyte Posted November 21, 2024 Author Share Posted November 21, 2024 I enquired about this, and they said that the map would not have been refreshed. As that constitutes a fresh factory reset Would a remap repair revision be issued? Quote Link to comment Share on other sites More sharing options...
paulh2602601 Posted November 21, 2024 Share Posted November 21, 2024 An somebody with more expertise in mapping and software may provide insight, but I believe that assertion is inaccurate; a software update restores oecus to their factory defaults. A map may not resolve the issue, but it seems peculiar; therefore, it requires thorough verification. If the mapping was conducted with the DPF disabled, the absence of the DPF will impact boost levels. Conversely, if it has reverted to factory specifications without a DPF, this will also have repercussions. Quote Link to comment Share on other sites More sharing options...
stevenkeyte Posted November 21, 2024 Author Share Posted November 21, 2024 That is logical. If the vehicle's system continues to recognise the presence of a DPF that has been removed, would this not activate a diagnostic code or warning? Quote Link to comment Share on other sites More sharing options...
paulh2602601 Posted November 21, 2024 Share Posted November 21, 2024 No, I do not believe it will, since the DPF pressure sensor is not detecting a limitation; it is indicating enough flow. Quote Link to comment Share on other sites More sharing options...
vitessear3 Posted November 21, 2024 Share Posted November 21, 2024 Requires remapping. The update will restore the regular map by rectifying any alterations made during the mapping process. Quote Link to comment Share on other sites More sharing options...
stevenkeyte Posted November 21, 2024 Author Share Posted November 21, 2024 Can it be mapped by anybody, or must it be the original remapper? Quote Link to comment Share on other sites More sharing options...
paulh2602601 Posted November 21, 2024 Share Posted November 21, 2024 Any competent mapper; nevertheless, do thorough study, since not all mappers possess the same quality. Quote Link to comment Share on other sites More sharing options...
vitessear3 Posted November 21, 2024 Share Posted November 21, 2024 Agreement with the aforementioned statement. You don't want any old generic map dumping on it you want one for your own individual automobile. Quote Link to comment Share on other sites More sharing options...
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