EtherealWanderer Posted August 7 Share Posted August 7 I am experiencing an issue with my vehicle, which features a N57 engine, F07 chassis, and ZF8HP transmission. Initially, upon purchasing the car, it functioned optimally; however, after one month, a problem with the diesel particulate filter (DPF) emerged, indicating that it was clogged. Over the course of three months, the vehicle's performance deteriorated progressively. Subsequently, I removed the DPF and executed an EGR delete via software. Following this, a diagnostic message indicated a malfunction in the swirl flaps actuator, and the vehicle continued to exhibit suboptimal performance. I then deleted the swirl flaps and reprogrammed the system accordingly.The message for the flaps has disappeared, yet my car continues to exhibit sluggishness. After four months and a Stage 1 tune, there has been no improvement. Additionally, the transmission occasionally shifts with a jerk, and during upshifts, it seems to restrict the engine's full power, causing the vehicle to lurch backward, which is peculiar.I am now receiving the MAF sensor code. Signal deviation is very high at idle, and I am receiving a transmission code related to the RPM sensor, as well as a high fuel pressure pump code. However, the vehicle starts without issue and idles normally; there is no problem below 3000 RPM, but I experience a complete lack of power at that threshold.What are your opinions on this matter, gentlemen?Thank you, and I apologize for my poor English; nevertheless, I am striving to improve. Quote Link to comment Share on other sites More sharing options...
QuirkyPixel Posted August 7 Share Posted August 7 If you have replaced the gasoline filter incorrectly, rectify the issue before deleting or remapping; the sequence is crucial. Furthermore, no reputable tuner would modify a vehicle with existing issues.A competent tuner would identify issues, rectify them, and then perform tuning. Quote Link to comment Share on other sites More sharing options...
nickoyster4 Posted August 7 Share Posted August 7 As already said. Additionally, try it with the MAF detached and see the results. Quote Link to comment Share on other sites More sharing options...
EtherealWanderer Posted August 7 Author Share Posted August 7 Is it advisable to detach the sensor and operate the vehicle in that manner? Quote Link to comment Share on other sites More sharing options...
QuirkyPixel Posted August 7 Share Posted August 7 Indeed, it reverts to the normal stock setting. Quote Link to comment Share on other sites More sharing options...
EtherealWanderer Posted August 7 Author Share Posted August 7 A brief update I have completed that, nevertheless the vehicle remains unchanged, save from the illuminated check engine light. Quote Link to comment Share on other sites More sharing options...
nickoyster4 Posted August 7 Share Posted August 7 What is the status of the fuel filter? Quote Link to comment Share on other sites More sharing options...
EtherealWanderer Posted August 7 Author Share Posted August 7 I modified it a week ago. Quote Link to comment Share on other sites More sharing options...
EtherealWanderer Posted August 7 Author Share Posted August 7 This is the code for the mass air flow sensor. Quote Link to comment Share on other sites More sharing options...
EtherealWanderer Posted August 7 Author Share Posted August 7 Quote Link to comment Share on other sites More sharing options...
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