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IJD posted a topic in E39 1996-2004Hi All, Ive been having issues with the 530D touring which I bought t'other week... I was told that it was slow when I bought her - and she was! The seller also said the MAF was unplugged as he thought this was at fault... When I got home, after a closer investigation, the vacuum pipe to the turbo had fallen off - replaced and things improved quite a bit. Also, I plugged the MAF back in - this didn't really make much difference - it just stopped the tiny amount of diesel smoke which I expected. Then the next time I went out in it, it started intermittently boosting. Sometimes it would drive ok (still slower than it should be), then other times, it wouldn't boost and the engine had no power above 3200rpm. Top speed with foot flat down was about 45mph ish (it would actually go faster with part throttle!) The lack of boost got worse, to the point where it just never happened! After a bit of fiddling, the car performs best with the MAF plugged in, and the MAP unplugged - second the MAP is plugged back in, the turbo stops boosting (the turbo actually sounds different!). I assumed that the MAP must be faulty, tried to clean it, but it made no difference. Ive just fitted a new one from ECP today, and it made no difference - so I now guess that there's nothing wrong with the old MAP after all, but why does it run better when it is unplugged? I also did a 0-60 test to try and get a benchmark figure - ok, I know a mate with a stopwatch ain't the most accurate test, but shes taking +11.5sec to 60mph - I was expecting high 8's. Any ideas?
Hi All, Looking to purchase an LCI 525D or 530D, I will be doing mostly town driving so the 520D would probably appeal more in respects to MPG but I wouldn't mind sacrificing some MPG for that awesome torque increase! I am willing to DPF gut, swirl flap removal and map the car to squeeze some extra power and MPG but I'm interested to know how the two engines compare both with common problems and MPG town driving if possible. Cheers.
Hi, I am new to this forum so hoping someone may be able to help me. I have a 2004 E60 530D with the M57 engine. The problem I have had has been engine rev fluttering between 1100 - 1500 RPM, pitch change to engine tone (intermittent), reduced boost from turbo/ limp home mode (intermittent). All of these problems have become more consistent. I have now done the following; Full Service, cleaned MAF/MAP sensors, Blanked Swirl Flaps, cleaned inlet manifold / intercooler / anti shudder valve / EGR valve / Air intake ducts, replaced vacuum hoses, new battery, injectors serviced, DPF cleaned with fuel treatment. I have also made my own Oil/air separator to put inline to the oil breather feed to the turbo. The BMW cyclonic oil breather filter does not seem to do a massive amount. After all of this the engine still runs lumpy, not able to accelerate and no boost. I unplugged the MAP sensor and the engine instantly smoothes out revs fine. When I unplug the MAP sensor the Turbo variable vane actuator moves and the engine runs fine. When I plug the MAP sensor back in the turbo actuator moves again and the engine runs poorly. I have plugged it in with no fault codes. Can anybody tell me why unplugging the MAP sensor would make the turbo actuator move and the engine run smoothly? I am going to try a replacement MAP to see if the problem goes away. I also unplugged the MAF sensor and the engine seemed to be even more responsive.