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Found 5 results

  1. Trying to track down an issue with boost I guess on my 530d If I drive slowly, it’s hardly noticeable…so allowing a more progressive acceleration…but I do like to plant it allot and really shouldn’t have a blip in power like this. Just feels laggy pre 2k revs and then pulls like train throughout rest of range…evident on upshift till it peaks over 2k again too ☹ It’s a pre-lci so don’t have a turbo pressure converter, has an electronic turbo actuator and that’s now new (old one was tested and ok too) – already done following: swirl flap/egr/egr cooler, cat/dpf/backbox deleted Crank case breather/map sensor, vac pressure convertor, ic pipework seals, vac lines...all been replaced air filter ok No faults on diagnostics New turbo/actuator aftermarket bigger intercooler oil pressure ok compression check done and ok injectors tested/refurbished whilst out/new seals fitted Replaced MAF with Bosch one two years back , but I’ve spotted is whilst have lag pre 2k now…unplugging it reduces the issue to 1.5k when removed I’ve had issue for a while and doesn’t get worse or anything…but bugging the hell out of me. If you have a manual car and clutch going…it’s that same delayed feeling of acceleration…saying that, it’s an auto box…they still have a clutch of sort, could this be effed? I don’t think its torque convertor as its nice through gears and have null fluctuating or anything Any ideas?
  2. Hi 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?
  3. 530d loss of power not MAF?

    Helllo guys! I'm new to the forum and new owner of e39 530d. I read through forum and didn't found exact match for my problem, so sorry for probably repeating but I'm just confused. So, the bad: - loss of power - it is slower than 1.6 diesel focus, struggle up the hill - it's not a MAF - as that been checked And the good: - engine starts without problems - engine runs smooth - when driven or not it isn't playing on revs or something and there is no power to kick in on some revs like i found in other topics. - it's not smoky- of course without hard kick in accelerator but as far as i konw it's normal for diesels - turbo is running - its not noisy but i can hear when it kick in - or better when acc pedal is released. So I'm asking for help Is just cleaning second fuel pump - under passenger seat - good, or better to just replace it. It need servicing all filters etc. would that help or not - I will do it anyway but what i can expect? vacum hoses are they more accessible form the top or bottom of the car? what else to look for? maybe is there any forum user around Plymouth with computer so we can read diagnose faults? Cheers guys.
  4. Map Sensor Issue?

    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.
  5. I have a 1997 BMW 540I that recently had the mass airflow sensor replaced by a non BMW mechanic. (Even still I think I was overcharged for the work done). about 25 miles after driving away the check engine light came on. Autozone let me use an OBDII scanner and the error was fuel trim error on both banks. I suspected the O2 sensors were damaged since a lot of excess fuel was being dumped into the system. After replacing them and clearing the code it came back in about 50 miles. I finally got a version of INPA/DIS to work and looked into it further. What I see is that at idle the air required is maxed out ( appx 25) and the air required is maxed out as well. Is there something that should have been done when the new MAF was installed? I have checked for any vacuum leaks pre-engine and cannot find anything. Any ideas?