525d Power Lag |
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denishogan
Really Senior Member II What’s this title thing about then? Joined: 29-March-2005 Location: Limerick, Ireland Status: Offline Points: 814 |
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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. |
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Ben O Brien
Really Senior Member II Joined: 12-August-2004 Location: Limerick,Ireland Status: Offline Points: 1205 |
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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? |
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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* |
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denishogan
Really Senior Member II What’s this title thing about then? Joined: 29-March-2005 Location: Limerick, Ireland Status: Offline Points: 814 |
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@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. |
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T.J.
Bavarian-Board Contributor Joined: 22-September-2003 Location: Cork, Ireland Status: Offline Points: 2332 |
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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. |
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bmwcare
Really Senior Member I Joined: 02-June-2006 Location: Galway Status: Offline Points: 321 |
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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..." |
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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 |
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Kin Mak
Bavarian-Board Contributor Joined: 09-April-2005 Location: Dublin, Ireland Status: Offline Points: 1691 |
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Whatever mate, I don't drive tractors. p.s. No offence... really. |
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uoi1772
Groupie Joined: 10-April-2004 Location: Northern Ireland Status: Offline Points: 67 |
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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! |
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Diesel Power
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flyingalexf68
Really Senior Member II Joined: 01-April-2006 Location: 53°19’59,6°14’56 Status: Offline Points: 2581 |
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It's not an Impreza Kin. Turbos on diesels kick in around 1500rpm and are at full boost (peak torque) at around 1800. |
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Kin Mak
Bavarian-Board Contributor Joined: 09-April-2005 Location: Dublin, Ireland Status: Offline Points: 1691 |
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Turbo lag?
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bmwcare
Really Senior Member I Joined: 02-June-2006 Location: Galway Status: Offline Points: 321 |
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What car is this? Also, Manual or Auto? |
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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 |
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denishogan
Really Senior Member II What’s this title thing about then? Joined: 29-March-2005 Location: Limerick, Ireland Status: Offline Points: 814 |
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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. |
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uoi1772
Groupie Joined: 10-April-2004 Location: Northern Ireland Status: Offline Points: 67 |
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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?
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Diesel Power
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