Originally Posted by xytras1979
Hello again, I think I have solved my problem / engine works fine now / good Vanos parameters + no MIL. I will explain you exactly what I have done :
1. I have flushed my engine with METABOND CL ,after I have changed the Oil even the oil had less 3000 km. ( The oil filter was very dirty - so I think that Metabond have done something...
2. I have replaced both non -return valves on the cyl head (code 11367541692- see also the pictures) - both of them found very dirty. These "non- return valves / checked valves" prevent the oil to drain form the cyl. head when engine is stopped ;
3 . I have replace only the intake solenoid valve . Now you can see from the INPA print that the "E-ventil" is working . Before on the INPA graph it was stuck on 125 CRK / 10 % opening- in fact this is the value when the engine is stopped - normaly it should be around 85 CRK and the opening percent should change in real time.
Frankly I don't thing that the problem was the solenoid ( I have mesure the resitance and I found same value on old ones like the new one) I think that the problem comes from the dirty oil / sludge in engine & the clogged "non -return valves" ....interesting .
So keep your oil clean / keep your engine clean and maybe you can have fun ...
It is good to hear that you had success.
I am surprised that the non-return valves have that accumulation on them.
The resistance on my intake solenoid seemed OK, like yours. However, I don't think the electrical part of the solenoid had failed. I think the moving part was sticking and that BMW addressed that with a modified solenoid, hence the new part number.
Anyway, your problem is fixed.
Thanks for following-through and giving us the updates so that we may learn from your experience.