[Telly Addict]

Originally Posted by taibanl

So I am seeing speckles of oil on the bottom of the engine compartment underneath the turbo area...is this something I need to be alarmed at?

Sounds like your red boost hose seals. is your friend.

[taibanl]

Originally Posted by Telly Addict

Sounds like your red boost hose seals. is your friend.

Dude. I live on this forum. Not sure how i would have found such a specific answer.
Edit: Thanks for the response.... to be clear, the large red boost hose appears clean and clear. Just the under tray aft and below of that where some speckling of oil is starting to develop, figure it could be anywhere, turbos or boost hose, but as far as I can see the boost hose is clean (looking from top)

[Hoooper]

Grab a flashlight and start checking all of the oil feed lines to the turbo. Since they had it out that's definitely a potential source of a leak.

[GJB1980]

Update my cars now in an highly recommended BMW Independent garage , hopefully they will get back to me tomorrow , just going to try these before I take it to BMW main dealers

Thanks everyone for your advise its much appreciated

[GJB1980]

Still not sorted , garage thought it may be pressure converters , luckily they had all spares on there shelf , swapped everything over that was possible to change but cars still exactly the same , They said they will have to take turbo's off etc etc and have it a few days before they know what the problem is , they said usually its an easy fix but this is not the case ????

[Hoooper]

Originally Posted by GJB1980

Still not sorted , garage thought it may be pressure converters , luckily they had all spares on there shelf , swapped everything over that was possible to change but cars still exactly the same , They said they will have to take turbo's off etc etc and have it a few days before they know what the problem is , they said usually its an easy fix but this is not the case ????

you said the power comes on strong after 3k RPM but is weak before that?

[GJB1980]

Originally Posted by Hoooper

you said the power comes on strong after 3k RPM but is weak before that?

Thats right mate

[ChrizLoud]

Did you ever got this solved? I have the same problem.

Changed almost everything in the engine bay soon

[TorqueAddict]

Originally Posted by ChrizLoud

Did you ever got this solved? I have the same problem.

Changed almost everything in the engine bay soon

When this happened to my car, i replaced the red boost pipe+seals, vac lines and small turbo actuator. This the thread that put up back then :

http://www.e90post.com/forums/showthread.php?t=906745

Hope it helps.

[ChrizLoud]

Sorry already changed all that with no luck.

[TorqueAddict]

Originally Posted by ChrizLoud

Sorry already changed all that with no luck.

Make sure you get your Mechanic to check the VAC hose connections. Even after doing all this, i still had an issue with low power at lower RPM's, and it turned out when we swapped VAC lines, one of them was plugged into wrong place. I cant recall which one was it, but it was not at the right spot. After correcting it when i took mine for a test drive, it threw me sideways!

[ChrizLoud]

Thank you for your reply.
I don't trust anyone with my car. Doing all the work by myself

Everything is connected exactly as show on real oem.

[DieselRacer]

Originally Posted by ChrizLoud

Thank you for your reply.
Im don't trust anyone with my car. Doing all the work by myself

Everything is connected exactly as show on real oem.

AMEN...

[ChrizLoud]

Here is a link. I guess this must be the way it should be connected? http://realoem.com/bmw/showparts.do?...85&hg=11&fg=45

One think it notice is that when the car performs DPF regeneration it very quick and also it has no lag to talk about.

For example driving around in D doing a kick down it flyes away as soon the gearbox has made the gear change.

When not in DPF regeneration it shifts down and start to slowly and after 2 second it flyes!

[kbsilver]

Originally Posted by taibanl

So I am seeing speckles of oil on the bottom of the engine compartment underneath the turbo area...is this something I need to be alarmed at?

Nope, Think we all have that. They should be more like dry deposits than oil that is easily removed.

[ChrizLoud]

Im posting som INPA values:

First photo is taken at approximately 1500rpm full load in 6th gear.. been pulling from 1100rpm so boost is very stable but way much lower the the desired value to the left...
The boost basically wont go up more than this unless we hit around 2000rpm


Second photo is at neutral holding it at 2400rpm.. Think the MAF value desired vs. real is a bit off here right?

Can it be a MAF-problem?

[Jamesv]

Originally Posted by ChrizLoud

Im posting som INPA values:

First photo is taken at approximately 1500rpm full load in 6th gear.. been pulling from 1100rpm so boost is very stable but way much lower the the desired value to the left...
The boost basically wont go up more than this unless we hit around 2000rpm


Second photo is at neutral holding it at 2400rpm.. Think the MAF value desired vs. real is a bit off here right?

Can it be a MAF-problem?

Could be if reading incorrectly, or dirty, then A/F mix will not be right. Try cleaning it.

[ChrizLoud]

Also found a video of the actuator on a 335d..
After 20 sec after turning of the engine it should release pressure...

Mine does not do this like this.. it holds for 10 seconds the it slowly creeps back to deafult position.. take 10 sec to slooowly go back....

Tomorrow i will try to strangle the hose to the actuator to see if it still creeps.. i guess it should not go back.
If it does it might be faulty right?

If it does not go back the fault can be in the pressure converter (not likley since its already been replaced) or maybe the vacuum cannister?
is there a back-pressure valve inside it?

[TDIwyse]

Thanks for posting your investigation on this. I don't really have anything helpful to say, but it seems like you're looking at the correct stuff. It must be something to do with part # 2... During DPF regen does the small turbo automatically get bypassed due to exhaust heat? I haven't looked at that (can't anymore), but if that's the case then it would point even more towards part #2...

[DieselRacer]

Me like pictures...

[Anth87]

Anybody get to the bottom of this fault?

My 335d has this exact problem, took the car to my local bmw dealership to diagnose the problem. They say it was the pressure converters for the exhaust, they changed both of them and the bracket and its no different to when I dropped it off apart from its had a wash.

[ChrizLoud]

My dpf had to much ash in it.
Now its removed car is well. Mapped it out.

The big clock holds pressure and does not creep. It fixed it self.