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  #1  
Old 08-19-2020, 05:29 PM
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2004 X5 E53 3L D- turbo or injektor problems?

Hi
Have problems with the car (2004 X5 E53 3L diesel), it first looked like it had caught fire but it turned out that the smoke came from the exhaust, the engine has before this gone a little tough and the whole car has shaken a little when it has gone low rpm. first thought it was the turbo but checked it today and it seemed that it rotated nicely and that the paddle wheel went nicely around. Anyone experienced a similar problem? can this be due to the injectors?
On iobd2 scan it says something about Smooth running controller- not sure what it is? See attached picture
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Old 08-19-2020, 07:52 PM
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Smooth running control relates to injector correctional values. That code is present if some injector correctional value goes beyond accepted limits. So first check the values with proper diagnostics.
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Old 08-29-2020, 04:53 PM
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I have checked a little more and the engine has little power and I think there is something wrong with the charge pressure regulator or vacuum hose, on the error message it says 4530 charge air pressure control - present, anyone know what that means?
Tried to blow in the 2 hoses that go out from the vacuum reservoir when the car is turned off and on one side it is tight but on the other side (marked yellow in the picture) it is not tight but maybe it should be like that?
From the split, a vacuum hose goes under the intake manifold but I can not see where it leads and I would rather not disassemble the manifold, anyone know where it leads?
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Old 08-29-2020, 07:43 PM
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There is a vacuum manifold under the intake manifold. Basically a feed of the vacuum from the vacuum pump.

The pressure charge regulator is easy to test (need a hand-help vacuum pump they are cheap) - theres a tonne of videos on how to do this on YouTube.

The reservoir can sometime split but the pressure regulator is also a common issue.
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Old 08-29-2020, 07:46 PM
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Here's the turbo check procedure: -

https://www.newtis.info/tisv2/a/en/e...tuator/XcGISOp

And here's the vacuum line routing: -

https://www.newtis.info/tisv2/a/en/e...-valve/Bty4zsn

https://www.newtis.info/tisv2/a/en/e...-valve/AXdsYr2
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Old 08-30-2020, 04:28 PM
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Thank you so much for your help wayne
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Old 08-30-2020, 05:01 PM
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If you do find split or damaged vacuum hose, I’d suggest getting some silicon replacement. It does the same job but takes heat,chemical,age damage a lot better..... and on top is much cheaper! (And if you want a funky colour you can.... but I just suggest the standard Black!)

Also if you find one split or damaged you will likely find the rest are on their way out! So just do all of it while your in there. BMW diesels are so sensitive to vacuum leaks it seems.

3mm internal diameter will work as I think the rubber OE stuff is 3.5mm ID (correct me if I’m off!) but it’s dirt cheap by the meter on a popular auction site. I actually rerouted my 535d’s hoses to avoid hot components. That buggar has about 3-4m of vacuum line with the two turbos lol
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Old 08-30-2020, 05:06 PM
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Quote:
Originally Posted by Redraptor141 View Post
If you do find split or damaged vacuum hose, Id suggest getting some silicon replacement. It does the same job but takes heat,chemical,age damage a lot better..... and on top is much cheaper! (And if you want a funky colour you can.... but I just suggest the standard Black!)

...
Be careful using silicon hose for vacuum lines - some silicon hose is not very rigid and can actually collapse under vacuum...
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Old 08-30-2020, 05:10 PM
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Item 1 (boost solenoid/vacuum solenoid) on your picture would be my next stop after checking the lines. As this solenoid controls the application of vacuum to the actuator. They can be serviced quite easily, just have a look on YouTube..... but equally you will have to remove it to service it so it’s easy to just get a new one and replace it if you suspect it’s bad.

Item 6 (vacuum accumulator/tank..... if you can have a tank full of vacuum lol) have been know to leak from cracks and pinholes. So easy to whip it off, seal one end, use a tyre pump (even a bike one will do) apply some pressure Into it and spray some soapy water over it and look for bubbles. These are fixable with some epoxy to where the leak is. But again is quite cheap second hand as they are used on all BMW diesels of this era
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Old 08-30-2020, 05:13 PM
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Easy to test all that with a vacuum pump too.

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