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  #1  
Old 07-21-2019, 06:08 AM
X5-mark X5-mark is offline
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Mein Auto: X5, 3.0 petrol, 2002
2007 3.0d hesitant / sluggish at low revs

Hi
I've had a bad run with the X5 recently, turbo, rear diff, hand brake module, air bags...
Over the last couple of weeks it's been hesitant at low revs which is a nightmare pulling out of junctions and on motorways.

I've done a couple of things today;

Read codes with Carly ;
Glow plug cylinder control on 1,2,5 & 6
003FF0 - Air flow sensor

So ;
Unplugged the MAF - drives much better
Replugged MAF
Unplugged EGR vacuum pipe - drives much better
Replaced the EGR with one said to be good - issues still there

Currently I have the EGR vacuum pipe disconnected and capped to make it better to drive.

1. Could this do any damage?
2. What could be the reason for this issue?

If anyone has had (and fixed) the same issue or if you have any ideas please let me know.

Thanks a lot
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  #2  
Old 07-21-2019, 08:15 AM
ard ard is offline
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On an otherwise unmolested diesel, no prior issues..noboidy hacking on it previously, I'd say replace the MAF, glow plugs AND controller.


You mention 'turbo'... What was done without that??
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Old 07-21-2019, 09:24 AM
X5-mark X5-mark is offline
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Hi, thanks for the reply. Yes as far as I know all is standard and it's been well maintained.
The turbo was replaced around 7 weeks ago.

My first thought was as the car runs well with the MAF connected and EGR vacuum unplugged meant the MAF was good... but I guess the fact the car runs fine with the EGR vacuum unplugged means the MAF is getting different air flow so runs the car ok?

Thanks
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Old 07-21-2019, 10:23 AM
ard ard is offline
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..and people used to think we got sick due to 'bad blood'...hence leeches were used to suck the bad blood out.
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Alignment here: The Definitive Alignment Thread

OE is Original Equipment aka 'BMW Original Parts' aka 'What you buy at the BMW dealer with a BMW label'

OEM is Original Equipment Manufacturer... EITHER the company that made the OE part or.... A part this is identical to the OE part, but is sold by the OEM under their own label


OEM is not what BMW sells


http://www.bimmerzone.com/category/T...ricks_OEM.html

https://www.turnermotorsport.com/t-OEvsOEM
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  #5  
Old 07-21-2019, 10:50 AM
X5-mark X5-mark is offline
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Errr... ok
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  #6  
Old 07-21-2019, 10:56 AM
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Doug Huffman Doug Huffman is online now
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Location: Washington Island, Wisconsin, thru Death's Door
 
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Mein Auto: CPO2012 X5 35d M57(E70)
Quote:
Originally Posted by ard View Post
..and people used to think we got sick due to 'bad blood'...hence leeches were used to suck the bad blood out.
Still do, still are. See Hirudo Therapy.

https://www.ncbi.nlm.nih.gov/pubmed/12661792
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Old 07-21-2019, 02:13 PM
X5-mark X5-mark is offline
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Thanks for your help
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Old 07-21-2019, 07:29 PM
FredoinSF FredoinSF is offline
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Could there be something wrong with the new turbo or one of the connections to it?


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Old 07-22-2019, 12:33 AM
X5-mark X5-mark is offline
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Mein Auto: X5, 3.0 petrol, 2002
Hi,
It's a possibility- but the car was working fine for over a month after the turbo... and after 2000rpm the turbo kicks in and it accelerates well with no hesitation etc, i think I read somewhere that the turbo doesn't kick in till 2k and it's only low revs this issue occurs.
And why would the EGR vacuum being unplugged make everything work well again?
Thanks
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