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Cukovic123 Cukovic123 is offline
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Default N54 335i JB4 Overboosting - 04-24-2019, 06:55 AM

Hello friends,

I have the problem of overboosting on my N54 with JB4 and ******* **.
As you can see in the logs the boost wents over target and kicks me into map 4.
The car was running good, until i changed the clutch.
Probably because the whole Engine was moving a lot while remove the gearbox some pipe or vacumline fall off the right spot

Sometimes i can hear the turbo spool when i realese the gas.
I checked all vacum lines but they seem to be at there place.


Thank your for your answers.

Greetings
Attached Files
File Type: csv 190424_0146.csv (101.9 KB, 12 views)
File Type: csv 190424_0125.csv (14.3 KB, 8 views)
File Type: csv 190424_0045.csv (14.3 KB, 9 views)
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Default 04-24-2019, 08:36 AM

Check if there is physical obstruction of the wastegate actuator arms. Almost feels one may be pushed towards closed position and stuck there. Or maybe one of the brackets got bent. How much did the engine move? Did you lift it from the mounts? Vac problem usually results in lower boost not over. Otherwise it might just be a tuning issue of menu 10 and 12 settings, but it would be odd to develop so suddenly if it was fine before. Any other mods? Stock turbos?
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Default 04-24-2019, 09:50 AM

I will check the wastegate arms now, menu.10 and 12 settings should be fine.
Which brackets do you mean?
Thanks for the fast response !
Everything else is stock.

Last edited by Cukovic123; 04-24-2019 at 10:00 AM.. Reason: Forgot something
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Default Wastegate arms move free - 04-24-2019, 10:38 AM

Wastegates are able to move free, and they do.
Is it possible to have overboost because of a leak on the pipe which comes directly on the turbo ?
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Default 04-24-2019, 11:16 AM

Any leak on the charge side would result in underboost, not over.

Seems like a long shot, but if one of the inlets came off, it might cause the turbo to spool faster due to less restriction. I've heard of the rear one popping off.
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Default 04-24-2019, 01:32 PM

The rear intake seems to be leaking a little bit.
I will fix it tomorrow.
Thanks
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Default 04-25-2019, 11:53 AM

I have fixed the inlets with new gaskets, and its still overboosting.
Some new ldeas ?
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Default 04-25-2019, 11:57 AM

Is WG arm blocked? What happens on say map8?


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Default 04-25-2019, 07:23 PM

Hey, no the wastegate arms are moveing free for sure.
Map 8 is running totally fine aswell.
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Default 04-27-2019, 10:09 AM

Hey guys,
My inlets are good , wastegates do move properly and its not a software or setting problem...
Isnt there any different possible thing, which could cause the overboost?
In map 8 it doesnt make any boost and the car runs good again.
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Default 04-27-2019, 06:43 PM

Quote:
Originally Posted by Cukovic123
Hey guys,
My inlets are good , wastegates do move properly and its not a software or setting problem...
Isnt there any different possible thing, which could cause the overboost?
In map 8 it doesnt make any boost and the car runs good again.
Boost solenoids perhaps?



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Default 04-30-2019, 07:33 PM

Hey guys,
I have replaced my inlets, checked the wastegate arms multiple times, and replaced the boost solenoids.
I do still get kicked into map 4 - boost over safety....

I dont have any ideas what to do next.
Thank you guys for the great help
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Default 04-30-2019, 10:57 PM

Quote:
Originally Posted by Cukovic123
Hey guys,
I have replaced my inlets, checked the wastegate arms multiple times, and replaced the boost solenoids.
I do still get kicked into map 4 - boost over safety....

I dont have any ideas what to do next.
Thank you guys for the great help
Any current logs from today?



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Default 05-01-2019, 07:47 AM

I will capture some new logs today, but i think, they will be the same like before.
Thanks
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Default 05-01-2019, 10:43 AM

Quote:
Originally Posted by Cukovic123
I will capture some new logs today, but i think, they will be the same like before.
Thanks
Sounds good.

Sounds redundant but just triple check all settings too before logging .

We will get this sorted



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Default 05-06-2019, 05:12 PM

First of all, i appreciate your support guys !
I did a new log, i could not do it earlier, sorry for that.
Its still overboosting .

So the things i have done meanwhile are:
1. Checked settings multiple times, tried lowering menu 12.
2. I Have repaced the gaskets of the inlets to make 100% sure they are fine.
3. Replaced boost solenoids.
4. Tried going back to stock flash. (And yes im on the right settings 4/2 or 4/3)
5. replaced all vacum lines (but they should not be the problem as i understand)
6. Checked wastegate arms, and they do move free aswell.

I really dont know what to do anymore

Log is attached

greetings
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Default 05-07-2019, 08:11 AM

Whats the lowest menu 10 setting you have tried? You may need a very low setting like 20. I don't see why that would suddenly change though.

Also might want to double check where all of the vacuum lines are connected. If one of the WG lines went directly to vacuum source instead of the solenoid, you would basically be at 100% WGDC all the time on that turbo, which is kinda what this looks like.

Not sure what else can happen during a clutch job... maybe the bracket that holds the WG actuator got bent, changing the position? No idea at this point.
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Default 05-08-2019, 11:45 AM

Im 100% sure its not a problem with the settings, ive tryed everything with the menus and went back to stock aswell.
Ive replaced the vacum lines one by one so they are 100% okay.
Map 8 is working fine aswell.
How can i check the wastegates to be 100% sure aswell.
Because i can see them moveing free,.
Is there any other option to test the wastegates?
Thanks!
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Default 05-16-2019, 06:28 AM

Still not running...
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Default 05-16-2019, 08:24 AM

Map 8 is a zero/low boost map so it would work I guess.

Checking the WG is pretty tough. You'd have to remove the *** and manually apply vacuum, check the position at each extreme, and adjust the arm if necessary. Its very difficult to do with the turbos installed, especially the front.

Any chance you can get a pic of the rear WG arm and such?

Since it started after that clutch job, and you said the engine moved a lot, I'd have to think something physically got moved since the tuning looks OK. Really weird.
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