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  #11  
Old 08-30-2020, 05:15 PM
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Good Point WPoll.

I’ve never had an issue but i use hose with a large ID/OD wall. So definitely something to consider

Yeh I would definitely suggest buying one of the pumps above. So useful with all the bloody plumbing on cars these days. And cheap as well. I was just trying to suggest ways of testing if the OP didn’t have one.

I would say my 535d had the exact same symptoms as yours and it turned out to be a combination of vacuum leaks and a duff solenoid. FYI the solenoids are 29 on eBay here in the U.K. I would try to get a Pierberg one if you do need one as I believe that was the original manufacturer.
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Last edited by Redraptor141; 08-30-2020 at 05:21 PM.
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  #12  
Old 08-30-2020, 05:32 PM
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https://youtu.be/dkPuEmwP4oQ

Worth a punt if you suspect the solenoid. I’ve done this same thing on a Mercedes one a couple years back and it still works now.
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  #13  
Old 09-02-2020, 04:32 PM
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Thank you very much for good suggestions and help so far, have now had the vacuum hoses checked except for those marked yellow in the attached picture because they were difficult to follow because they were hidden under the manifold and miscellaneous. Can leakage in that part of the hoses lead to reduced power on the engine and a lot of smoke from the exhaust? Seems to me that it will be a lot of work to replace them
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  #14  
Old 09-02-2020, 04:53 PM
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Quote:
Originally Posted by norway2 View Post
Thank you very much for good suggestions and help so far, have now had the vacuum hoses checked except for those marked yellow in the attached picture because they were difficult to follow because they were hidden under the manifold and miscellaneous. Can leakage in that part of the hoses lead to reduced power on the engine and a lot of smoke from the exhaust? Seems to me that it will be a lot of work to replace them
Parts labelled 2b & 2c in the above diagram are easy to get at - they are the EGR components and are not under the intake manifold. The pressure modulator/converter unit 2a IS under the intake manifold, so harder to test.

Parts associated with "3" (3a, 3b & 3c) are not fitted to the e53 platform - they control the radiator flaps on the e46 only.
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Last edited by wpoll; 09-02-2020 at 08:19 PM.
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  #15  
Old 09-05-2020, 04:52 PM
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Hi
Thank you for taking the time to provide such a comprehensive answer, which has been of great help
Took off the manifold today and got the vacuum hoses checked properly and it turned out that there was a small crack in the hose from the vacuum tank to the split located under the manifold, changed the hose and got back the engine power that was missing :-)
When I had the manifold I also saw another part that had a bad hose, when I googled part number I got up pressure converter exhaust control and the hose that was bad went down to the bottom of the engine somewhere, will check closer tomorrow but is does anyone know where this goes and if it has an important function? This may well have something to do with the fact that I got so much smoke from the exhaust
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  #16  
Old 09-05-2020, 05:41 PM
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If the vacuum hose was with red stripe it's for engine supports.

https://www.realoem.com/bmw/enUS/sho...diagId=22_0076
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  #17  
Old 09-10-2020, 03:26 AM
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Changed the vacuum hose today, it went down to a split and on to the engine mounts, even though I changed the hose which was bad I am bothered that the whole car shakes a bit when it idles low and stands still (almost like sitting on a bus :-). When the engine is cold it does not shake, expect the engine mounts to be bad but it was difficult to get them checked properly since they were mounted quite inaccessible. Tried to blow in the hose that goes down to the engine mounts and it did not seem to be resistance.
Has regained the power in the engine but still smokes a lot at start-up and for a few seconds afterwards and then the smoke disappears again
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  #18  
Old 09-14-2020, 04:41 PM
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Hi
I still have problems with the engine, the turbo has regained a lot of power after reeration of vacuum hoses but still runs rough, mostly when it is hot. I now think that injector no. 5 is bad, when I disconnect power to the injector when the engine is cold I hear a difference in how the engine runs, but when I do the same when the engine is hot I hear no difference. has anyone experienced this before ??
Is it necessary to code injector if i replace it?
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  #19  
Old 09-14-2020, 05:01 PM
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Quote:
Originally Posted by norway2 View Post
Hi
I still have problems with the engine, the turbo has regained a lot of power after reeration of vacuum hoses but still runs rough, mostly when it is hot. I now think that injector no. 5 is bad, when I disconnect power to the injector when the engine is cold I hear a difference in how the engine runs, but when I do the same when the engine is hot I hear no difference. has anyone experienced this before ??
Is it necessary to code injector if i replace it?
Do you have any software that can diagnose the issue? INPA works well in this case, with diagnosis tools like Selective Mass Adjustment etc...



This can help you track down an injector issue, such as injector #2 in the image above (not my car!)

And yes, if you replace an injector, it must be coded in the DDE.

https://www.newtis.info/tisv2/a/en/e...-lines/45TwIED

I think the adjustment steps refer to BMWs DIS diagnostics system, although I think it can also be done in INPA, ISTA-P etc.
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