525d Power Lag |
Post Reply | Page 12> |
Author | ||
uoi1772
Groupie Joined: 10-April-2004 Location: Northern Ireland Status: Offline Points: 67 |
Post Options
Thanks(0)
Posted: 16-April-2007 at 00:14 |
|
Anybody shed any light what could cause a power lag between 1-3x1000rpm? Thing is, the power really kicks in at 3x1000 rpm and the car flies. I've changed the Air Filter and the Mass Air Flow Meter which has helped slightly. The car only has 60k on it. Just doesn't seem right! Any suggestions?
|
||
Diesel Power
|
||
Sponsored Links | ||
denishogan
Really Senior Member II What’s this title thing about then? Joined: 29-March-2005 Location: Limerick, Ireland Status: Offline Points: 814 |
Post Options
Thanks(0)
|
|
Could be the EGR valve... they can go - usually leading to flat spots in the power delivery. Not 100% certain, but if it is the EGR valve, it should show up during a diagnostic check - your local mechanic should be able to plug it in for you (or if you are looking for a specialist, you could try Border Motor Works outside Strabane).
It could also be one of those little hoses going to/from the turbo - they can crack. |
||
bmwcare
Really Senior Member I Joined: 02-June-2006 Location: Galway Status: Offline Points: 321 |
Post Options
Thanks(0)
|
|
What car is this? Also, Manual or Auto? |
||
BMW & Mercedes Specialist.
Galway & Surrounding Areas. www.bmwcare.com www.mercedescare.com All BMW models covered including E60/E90/F01/F10 with flash programming/CIP/coding as required |
||
Kin Mak
Bavarian-Board Contributor Joined: 09-April-2005 Location: Dublin, Ireland Status: Offline Points: 1691 |
Post Options
Thanks(0)
|
|
Turbo lag?
|
||
flyingalexf68
Really Senior Member II Joined: 01-April-2006 Location: 53°19’59,6°14’56 Status: Offline Points: 2581 |
Post Options
Thanks(0)
|
|
It's not an Impreza Kin. Turbos on diesels kick in around 1500rpm and are at full boost (peak torque) at around 1800. |
||
1995 e36 3.0 M3 Coupe, Daytona Violet, AP Racing BBK, CCFL Angel Eyes, M3 Spoiler, M-Tec 3 Steering Wheel.
2000 530d Steptronic, Poverty Spec, 18" Alloys. |
||
uoi1772
Groupie Joined: 10-April-2004 Location: Northern Ireland Status: Offline Points: 67 |
Post Options
Thanks(0)
|
|
Noticed a slight leak on the ground at home and in the usual place where I park in work, which makes me think, it could be cracked turbo hose you suggested, but I will have the diagnostics checked for that EGR valve you also pointed out that could be at fault. The cars an '02 525d with manual gearbox. Will come back with any findings, cheers! |
||
Diesel Power
|
||
Kin Mak
Bavarian-Board Contributor Joined: 09-April-2005 Location: Dublin, Ireland Status: Offline Points: 1691 |
Post Options
Thanks(0)
|
|
Whatever mate, I don't drive tractors. p.s. No offence... really. |
||
bmwcare
Really Senior Member I Joined: 02-June-2006 Location: Galway Status: Offline Points: 321 |
Post Options
Thanks(0)
|
|
EGR is a possibility. There is a full test procedure that can be carried out during a diagnostic session. Either a dealer with GT1 or Independent with Autologic will have this facility. Other aftermarket tools are generally crap at diagnosing this. There is also a flash update for that DDE - get your tech to check the programming slots and see if it has been updated. That may cure your problem - but it won't mask a fault. HTH, Eddie. PS: Kin, the best putdown I've found for diesels is (as quoted from a builder that had a few Rollers in his time - he was asked by an eejit was it diesel), "look, Diesel is for mixers..." |
||
BMW & Mercedes Specialist.
Galway & Surrounding Areas. www.bmwcare.com www.mercedescare.com All BMW models covered including E60/E90/F01/F10 with flash programming/CIP/coding as required |
||
T.J.
Bavarian-Board Contributor Joined: 22-September-2003 Location: Cork, Ireland Status: Offline Points: 2332 |
Post Options
Thanks(0)
|
|
Interesting post.... I've a manual 525TDS and there's nothing below 2,300rpm when the turbo spools up suddenly and spits you down the road - for another 1,500 rpm anyway! The car is pretty limp below that, to a point where it requires 1,800rpm and clutch slip to take off on an incline with any haste & to ensure it doesn't stall. Car is smooth out throughout rev range, produces great economy (46mpg on long journeys measured from tank) etc and nothing from the running suggests there's anything wrong - except for above obviously. Chatting to previous owner, he said that when he had lower end work done, there was a temp flywheel in, and garage adjusted fueling down via software and it ran as described. New flywheel went in, garage reset most stuff but never adjusted fueling up and owner just left it as it was until I bought it 50k later. How feasible is this to do?? I didn't think fueling was that adjustable... or that doing so could keep the car runing smooth, refined, no spikes or flat spots etc.. just relatively dead until the turbo kicks in. And before any smart lag comments Kin, it ain't lag! Edited by T.J. |
||
denishogan
Really Senior Member II What’s this title thing about then? Joined: 29-March-2005 Location: Limerick, Ireland Status: Offline Points: 814 |
Post Options
Thanks(0)
|
|
@uoi1772: a cheap dirty way of finding out if it is the EGR valve is to block off the exhaust side of it completely using a little metal plate - then take it for a drive - you should notice the difference. It's a bit of a hack job and don't recommend it.
@TJ: The turbo on my yoke starts to spool up round 2200-2300 - same as yours. But it has a decent amount of torque - it doesn't need to be revved to get away unless you are on a reasonably steep incline. Although it's not quite fit for any sort of a Hill at the moment. |
||
Ben O Brien
Really Senior Member II Joined: 12-August-2004 Location: Limerick,Ireland Status: Offline Points: 1205 |
Post Options
Thanks(0)
|
|
Mine was the same as ye describe lads, the chipping did a lot for it but before hand there was just nothing at any rev range (with all of my 115bhp!) Still the economy isnt missed and im on the look out for another one again. This 525d is it any relation to the older 525tds? OR is a 5 cyl version of the 530d? Ive never actually seen one up close or under the bonnet.. P.s. how are you getting on with it Denis? |
||
99' 740iL
99' 728i Sport 98' E39 M5 - Avus Blue, Dec Car! 96' M3 Saloon - Estoril Blue 94' M3 3.0 Convertible 91' E34 M5 - 3.6, Macau Blue *E36 M3's Breaking* |
||
denishogan
Really Senior Member II What’s this title thing about then? Joined: 29-March-2005 Location: Limerick, Ireland Status: Offline Points: 814 |
Post Options
Thanks(0)
|
|
It's a six pot Ben (afaik). I don't think BMW have ever done a five pot - but, as usual, I am open to correction on this. It's just a newer motor altogether.
My yoke is still sick - waiting for the parts to arrive. Should be able to get stuck into it early next week. Fingers crossed. |
||
T.J.
Bavarian-Board Contributor Joined: 22-September-2003 Location: Cork, Ireland Status: Offline Points: 2332 |
Post Options
Thanks(0)
|
|
@ Denis - yeah mine seems to be lacking alot of torque below the turbo point. a 2.5 litre NA diesel should pull better.
Edited by T.J. |
||
Ben O Brien
Really Senior Member II Joined: 12-August-2004 Location: Limerick,Ireland Status: Offline Points: 1205 |
Post Options
Thanks(0)
|
|
@ T.J, that is magnified even when it is chipped, i recall mine especially in 1st pulling away from a junction, if you let clutch out fully at say 1100rpm and floor it it would pause for a second, climb to 2200 slowly then whoosh... to around 4k ish.. @ Denis, hmmm 6 cyl, possibly a scaled down 530d so. Did you manage to do something about that timing chain.. Sure if you want a hand let me know ill be around, |
||
99' 740iL
99' 728i Sport 98' E39 M5 - Avus Blue, Dec Car! 96' M3 Saloon - Estoril Blue 94' M3 3.0 Convertible 91' E34 M5 - 3.6, Macau Blue *E36 M3's Breaking* |
||
flyingalexf68
Really Senior Member II Joined: 01-April-2006 Location: 53°19’59,6°14’56 Status: Offline Points: 2581 |
Post Options
Thanks(0)
|
|
Something wrong there lads. It should be at full torque below 2300rpm. As I
said 1800-2000 is the norm for Turbo Diesels. The 530d will pull very strongly from 1800rpm. You get pushed back into your seat. 2300 is far to high for the power to come in. I'd normally be changing up a gear in my Doblo van (1.9 JTD) at 2300-2500. And also now that I think, Pamela's mums Range Rover has the 2.5 BMW engine from the 525tds. It has all its power lower then 2300 as well. (not that it really has any power as it weighs 2.7 tonne empty) |
||
1995 e36 3.0 M3 Coupe, Daytona Violet, AP Racing BBK, CCFL Angel Eyes, M3 Spoiler, M-Tec 3 Steering Wheel.
2000 530d Steptronic, Poverty Spec, 18" Alloys. |
||
Ben O Brien
Really Senior Member II Joined: 12-August-2004 Location: Limerick,Ireland Status: Offline Points: 1205 |
Post Options
Thanks(0)
|
|
Well it does feel torquey below the power band, i.e you can start in 2nd and all that but the peak power or at least the start of the peak curve comes on just above 2k rpm and then you feel the boost. The 530d would be a much more sophisticated animal!
I think you mean all the noise alex! |
||
99' 740iL
99' 728i Sport 98' E39 M5 - Avus Blue, Dec Car! 96' M3 Saloon - Estoril Blue 94' M3 3.0 Convertible 91' E34 M5 - 3.6, Macau Blue *E36 M3's Breaking* |
||
flyingalexf68
Really Senior Member II Joined: 01-April-2006 Location: 53°19’59,6°14’56 Status: Offline Points: 2581 |
Post Options
Thanks(0)
|
|
Actually thats exactly what I mean. Not to mention the vibrations. Nice pic
Ben. Looks like someone having a laugh. They've taped up the lights to make it more aerodynamic. |
||
1995 e36 3.0 M3 Coupe, Daytona Violet, AP Racing BBK, CCFL Angel Eyes, M3 Spoiler, M-Tec 3 Steering Wheel.
2000 530d Steptronic, Poverty Spec, 18" Alloys. |
||
uoi1772
Groupie Joined: 10-April-2004 Location: Northern Ireland Status: Offline Points: 67 |
Post Options
Thanks(0)
|
|
The 530d aint more sophisticated than a 525d but it should definitely have more grunt than mine. These 2 motors have the same engine model code. Only difference is obviously capacity and the resultant output in power and torque 163bhp for mine and 184bhp for the 530d, these are '02 figures of course. The latest models are well up again on this. There's a definite problem alright with the pick-up in mine between 1 and 3 rpm, for since i've had the car, it hasn't lagged like this before. Someone mentioned earlier, a 530d pinning you to your seat when accelarating, this thing used to do the same before this lagging problem. Interesting though, when I booked the car in with local BMW dealer today, (who has a GT1 diagnostics tester) and explained the problem, they asked if I had the replacement Mass Air-Flow Meter programmed in when fitted. Not realising this needed to be done, they pointed out that they would do this first before running the diagnostics test. Incidentally, BMW diesel badging was first td, then tds and now 'd'. The latest 2.5'd' has an output of 177bhp and the 3.0d 231bhp. In hindsight TJ, my previous 2.5TDS never gave any trouble after 208k when I changed for this one, a real bulletproof motor! |
||
Diesel Power
|
||
T.J.
Bavarian-Board Contributor Joined: 22-September-2003 Location: Cork, Ireland Status: Offline Points: 2332 |
Post Options
Thanks(0)
|
|
That's what I'm hoping uoi1772 - I bought mine with 178k up on it, and a colleague had it for the previous 3yrs and 100k. It did throw a conrod @ 131k which required a bottom end rebuild though .... still on original turbo, intercooler etc etc..
|
||
mick o c
Senior Member II Joined: 08-October-2006 Location: kildare Status: Offline Points: 151 |
Post Options
Thanks(0)
|
|
|
||
mick
2001 530d steptronic |
||
Post Reply | Page 12> |
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |