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      03-14-2016, 04:55 PM   #1
mateusz
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Vanos problem N52B25

Hello!
First of all I want to say 'Hello'. I found a lot information about my car at this forum, thanks!
Unfortunately, I have problem with my e90 325i (2.5l) from 2005.
Often my car has loss of power and vanos doesn't work properly.
Code of faults is :
2A82
2AAC (not always)
2A2F(not always)
2A2E(not always)
What i done:
I changed place both solenoids and without any changes (before this also have fault 2a82)
I cleaned return valves - were clean without any old contamination.
Rest of errors can be due to wrong working of vanos?
I should buy two solenoids and change it?
This problem can by due to my oil? I use 10w40 Motul Synergie ( I have about 260k kilometers milage and previous owner used this oil).
Yesterday I erased all faults with Inpa and today (after 3 kilometers below 3k rpm) I don't have any error codes, and live data from Inpa look like below:

I will try update this live data after error - it can shows more.
Could you help me and comments my problem and photo which i attached? Many thanks for your help and sorry for my english.
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Last edited by mateusz; 03-14-2016 at 05:03 PM.
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      03-15-2016, 03:31 PM   #2
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Hi!
Short update.
Today I spent a lot of time in my car and I have new observations.
I used Inpa and live data. I started on cold engine and parameters 'Vanos Einlass / 'Vanos Einlass Sollwert and Vanos Auslass/ Vanos Auslass Sollwert have changed dynamically. Like below photo for example. Everything was ok and my engine work properly. Oil temperature and water temperature was high and still everything was ok.

I stopped my car and turn off it. After 3 minutes i start it again. parameters 'Vanos Einlass / 'Vanos Einlass Sollwert and Vanos Auslass/ Vanos Auslass Sollwert have changed dynamically but after about 10 sec idle working my car incresed rmp for 1-2 sec to 1500 and back to idle work.
Unfortunately, after this parameters died and stopped on position like attachement 2.

All restart looks like the same and errors is

2A82
2AAC.

Please, help me
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      03-21-2016, 06:48 PM   #3
mateusz
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Hi!

I am checked dis motors. Everything is ok..
Any idea?
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      03-26-2016, 01:32 PM   #4
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Most probably faulty Disa valve...

http://www.e90post.com/forums/showth...highlight=disa
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      03-28-2016, 04:16 PM   #5
mateusz
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Thanks for your answer. Do you think, small disa can be cause of my problem? Bigger disa motor is ok. I checked it. I have other idea, when i checked parameters my bmw - air mass sensor has wrong data. It exceed to the limit in Inpa.
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      03-29-2016, 02:40 PM   #6
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Did you replace maf with a genuine bmw or compatible ? Small disa is a manifold remove job but it's not at all a common fault on these. Clean with brake cleaner and swap intake exhaust vanos solenoids.
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      03-30-2016, 03:49 AM   #7
mateusz
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Hello,
I cleaned solenoids and return valve before I was posted, without success.
If it is necessary i will remove my air intake and I will check small disa but..

My Inpa shows me bigger mass flow than range and temperature on intake is bigger than outside temperature. As i good remember - it was 40 celsius on air intake, but outside temperature was about 5 celcius. It can't be temperature from enegine because car was cold.

I started my car and unplug the plug from mass air flow, without any effect. My car work the same with plug or unplug this.
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      04-01-2016, 03:42 PM   #8
mateusz
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Hello Again,

I unplugged wire from MAF and my car work properly. Vanos works, after restart also.
It can be cause of my all problem? Before i do this only on idle working. And i use my car with unplug maf and situation looks beter. I can check maf which i have?
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      04-02-2016, 09:31 AM   #9
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That's why i asked if you installed an Oem maf...never use compatible maf on these engines. Also check your Oxygen lambda sensors. When you unplug the maf,dme use some generic data flows and doesn't trigger your temperature and oxygen sensors,but you can not drive like that for a long time.
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      04-03-2016, 01:30 AM   #10
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I understand this process. If my maf show me wrong temperature and air flow they will be main cause of my problem as i good think. I will place order for new Siemens maf. It should be solve my problem..
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      04-11-2016, 04:32 PM   #11
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Cleaned my vanos and switched them today with crc after reinstalling I don't think I have ever seen the idle that solid, lol.. Anyone know if I should reset vanos activation through BT TOOL??
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