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  #126  
Old 09-09-2019, 07:49 PM
BMWaufKS BMWaufKS is offline
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That problem, yes. But both are still running lean with no apparent cause. Replaced the CrPS on #2 early this summer (as part of inspecting the manifold, etc. for cracks (none), and replacing its gaskets), and it is doing fine; haven't done the CrPS on #1 yet.
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Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat

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  #127  
Old 04-05-2020, 08:50 PM
and1kots and1kots is offline
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Quote:
Originally Posted by BMWaufKS View Post
That problem, yes. But both are still running lean with no apparent cause. Replaced the CrPS on #2 early this summer (as part of inspecting the manifold, etc. for cracks (none), and replacing its gaskets), and it is doing fine; haven't done the CrPS on #1 yet.
I have the same problem with your car(n52)
Did you find the problem??
I'm gonna change my transmission this week because everything else its ok

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  #128  
Old 04-06-2020, 04:08 AM
BMWaufKS BMWaufKS is offline
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Quote:
Originally Posted by and1kots View Post
I have the same problem with your car(n52)
That may be a drastic, disappointing move.
No codes, using a BMW E83 specific scanner?
Smoke tested the engine, and fixed all vacuum leaks?
Replaced your cam and potentially your crank position sensors?
Etc.
__________________
-------------------------------------------------
Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat

Parts for sale: https://www.bimmerfest.com/forums/sh....php?t=1382187
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  #129  
Old 04-06-2020, 04:25 AM
and1kots and1kots is offline
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I did everything exept the cam sensor and crank sensor
I think is the transmission because all the winter the car it was ok.
Now that the temperatures is up from 5Celsius it starts again

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  #130  
Old 04-06-2020, 03:53 PM
BMWaufKS BMWaufKS is offline
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Quote:
Originally Posted by and1kots View Post
I did everything exept the cam sensor and crank sensor
I think is the transmission because all the winter the car it was ok.
Now that the temperatures is up from 5Celsius it starts again
You may want to read the whole thread; my symptoms didn't start until the first warm day.
__________________
-------------------------------------------------
Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat

Parts for sale: https://www.bimmerfest.com/forums/sh....php?t=1382187
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  #131  
Old 04-06-2020, 03:59 PM
and1kots and1kots is offline
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I read all your posts and is the same like my car. Mine too starts with the first warm day. I change the cam sensor and its happened again but now I have a 29e1 code so I'll smoke test it for 3rd time

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  #132  
Old 04-06-2020, 07:49 PM
BMWaufKS BMWaufKS is offline
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If you have an N52, there's two camshaft position senders.
__________________
-------------------------------------------------
Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat

Parts for sale: https://www.bimmerfest.com/forums/sh....php?t=1382187
Reply With Quote
  #133  
Old 04-08-2020, 04:45 PM
and1kots and1kots is offline
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I smoke test it again and is leaking from the pcv.
I'll change the valve cover

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  #134  
Old 04-15-2020, 06:26 AM
alsd alsd is offline
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So, BMWaufKS,

In my search for the solution to what looks to be EXACTLY the problem you've described here in this thread, we've spoken on another thread and you've advised me et the SAS and check the reluctor rings.... no luck.

After reading your thread here (hadn't seen it until now) I really believe that I'm having the same sorts of issues as opposed to it being a transfer case/gearbox or Tyre issue. The issue did get worse when I replaced only the rear tyres but now after replacing the fronts also, it's still there and is getting back to being as bad as it was oreviously I think.

I have a weird rough running on cold start too and that seems to be getting worse over time. I have the m57tu2 engine so mines a diesel. No coils or plugs really to worry about. As I wrote in the other thread, I've got some error codes relating glow plugs but I'm led to believe that they are related to the fuel preheater. Maybe they are playing a part?

What's got me thinking is that I have an oil leak from somewhere up the top of the engine and I'm starting to think PCV valve and after reading this thread, vacuum leaks!

I was convinced that this issue was Inthe TC or gearbox but the more I start to think about it, the more I'm going down the line that this is actually a miss or engine induced issue issues and what I know only at the moment and maybe this will be obvious to you (my god you've done so much here, you appear to be the specialist of this issue!)

Symptom is exactly as you have. Not too bad cold but when it warms up it gets worse. Only really in the lower gears, after about 3rd it doesn't go away but becomes less obvious. My issue however also occurs when coming to the stop and I get the jerking as it almost stops, maybe as it shifts from 2nd to 1st.

Rough idle on cold start, worsening. Starts fine though.

Have replaced the TC actuator gear after the lights came on and the clicking sound from underneath was heard. Fun fact though, this jerking went away whilst I had temporarily fixed the actuator gear by turning it what I thought was enough to expose the non worn side. Turns out I didn't rotate it enough and the gear exposed the worm side and would again threw the lights. During this time (a few days) the jerking was totally gone. Car was only driving in RWD but was smooth as.

Fixed the gear and the lights go out and every thing returns to its jerky normal. While this issue was going on, the error codes were the standard to be expected with the TC actuator fault. After repairing the gear, cleared and rescanned...... nothing.

So I'm starting to think, vacuum, PCV and then maybe the cam and crank angle sensors.....

So I see you say that they're still running a bit lean but you've solved the jerking/hesitation problem? The car drives ok now is this correct?
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  #135  
Old 04-15-2020, 07:53 AM
mtbrdad mtbrdad is offline
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What repaired a random stumbling jerking almost fuel like starvation problem on mine, which was occurring since about 100k miles, was replacement of the Mass Air Flow (MAF) sensor. Previously I had looked at it and cleaned it with MAF cleaning solution. Also with the C110 code reader it never gave any MAF errors. I found a very good foreign car indy in the western Chicago suburbs and he had it for few days and diagnosed it. Problem solved.
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  #136  
Old 04-15-2020, 10:40 AM
BMWaufKS BMWaufKS is offline
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Many reasons for this similar group of symptoms! One lesson: for the transmission to operate well, the engine must be in perfect working condition. :-{
__________________
-------------------------------------------------
Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat

Parts for sale: https://www.bimmerfest.com/forums/sh....php?t=1382187
Reply With Quote
  #137  
Old 04-21-2020, 11:18 PM
alsd alsd is offline
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Just to update my situation.

I changed the TC oil today (no adaptations reset yet) and it appears to be 90% better. The stuff that came out was black and probably had clutch pack all through it.

I still think Iíve got a misfire or similar somewhere.... that will continue to be investigated!

For now, I hope Iíve hit the problem....


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