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Found 4 results

  1. I have been chasing a couple of fault codes for a few weeks, 3FF0, 4BC2 and 4530 Initially it seemed I had found the source of the issue as a chaffed and damaged Vac hose, between vac accumulator and turbo actuator. With this replaced I had better boost, but still quite weird on off behaviour, where initially throttle wouldn't yield a big surge of power at all, then sudden power, and then tailing off again. I tried un-plugging MAF and there was a slight improvement but not staggering as people described. I checked manifold for cracks in case this was a factor, but non observed. Then I started looking elsewhere. I had noted in torque that the boost gauge seemed to read offset at idle, about 4psi. However at the time I had put this down to torque being torque, and sometimes does odd things with boost, and baro offsets, as I have seen on other vehicles... So I started to look in DIS once I got it working (thanks Jimmy from Cableshack for excellent support) And noted a few MAF related faults. I found that the MAF on my car was genuine Bosch of correct PN, only fitted earlier this year based on the manufacture date. However I decided to change this anyway. No significant improvement.... As a result of changing, I wanted to reset MAF adaptations, however It seems that my car just doesn't want to do this, as in DIS it keeps showing them as 0 for both values. I decided to run the mass flow system test. And the first step threw up this.... Now, this was interesting, since I had not had any errors indicating that at key on the ECU was seeing any issues with the MAP sensor not matching the ECU barometric sensor. Looking at the list of faults codes which exist for the 530D, there should be a couple of different faults which might be flagged if the MAP does not match the ECU baro measurement closely enough.... Anyhow, I subsequently ordered a MAP sensor, and changed it. As soon as I keyed on after changing the sensor, the boost shows as very close to zero at key off and idle as it should, but in addition, I got both fault 4063 and 3F03, both which relate to the charge air pressure sensor plausability, and ambient pressure control . These cleared and have never returned, which is really odd, as it should have been the faulty sensor causing these. The car now performs as it should, no more delay in power, no more odd behaviour if I lift off and re-apply power higher in rev range, just mountains of torque. Its not chopping around the gears any more when using cruise control, and economy has improved. Also the MAF related faults have stopped appearing, so I can only assume the MAF was getting really confused, it was being told that the car was getting 4 psi more boost that it really was, so was expecting more flow than it was seeing. I guess this would explain smoke and loss of power at certain times, and also it must have been cutting boost early thinking it was hitting max boost earlier than it was. Has been a bit of a journey but the car now really has come alive.
  2. Tonight whilst driving the 535d home it stalled at speed. The car is a 2008 auto with paddles. In drive mode travelling in a 50mph limit on the motorway I came to the national and gently accelerated as normal. The car stayed in gear and started pulling then i felt a jolt and lost drive. I managed to pull over and found the engine had stopped. I checked it over and found no obvious physical faults. After removing the key it started and drove normally. About two miles up the road it did the same again. I nursed it home using manual shifting and keeping the revs up (boost/load low). I tested it again tonight and whilst initially driving fine as soon as it started pulling in D it stalled. This time i felt it was as boost came on. The auto also knocked itself into N. Any ideas? Quick google search suggests injector(s). Why it would shut off rather than go into limp mode puzzles me though. It also needs a full key out and back in agsin in order to start. Bit gutted as i've only had it a week and done 750 miles.
  3. 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?
  4. Hi guys im new to this forum I previously owned a 120D with the n47 177 engine and got rid of it after getting too many major problems. I have now got a E60 520d full service history owned it for 3 months not had a problem. A friend of mine who has the same car had noticed my car was very low on power i then noticed after i drove his exact same car exact same engine no remap no mods mine has 160k on the clock i now notice sometimes the car is close to stalling on junction i have to almost redline it to get off this is on and off one day it will drive super one day it will have low power , what could it be thanks. M47 pre lci
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