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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Bad Turbos or something else



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      07-08-2014, 12:28 PM   #1
Subninja
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Bad Turbos or something else

So on a short trip I noticed a crazy whine coming from my car. Also, the car will make no boost. I threw the p30ff code which is for underboost. Here is a video.



Also data logged with the Cobb though I don't know much about it or how to upload it to the forum. It just "screams" and makes no boost. Definitely doesn't sound good.
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      07-08-2014, 01:44 PM   #2
jaykayelemenohpee
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Check all your connections. Cp, ic, etc
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      07-08-2014, 01:55 PM   #3
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It sounds like the accelerator pedal is activating a hydraulic lift...wtf? I have no useful feedback...but bump for help.
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      07-08-2014, 03:13 PM   #4
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By the way here is information about our turbos. They are labeled "TD03L4-10tk3-4.9"

Here is a link explaining what that means and if I am reading it correctly it says max boost is 2.7 bar.


http://www.kamakdynamics.com/profile...o.php?newsid=6


So I would take that as the max boost these turbo chargers can run is about 24 psi relative to atmospheric. So is the TD03L4 a hybrid turbo and if so did BMW switch to from the TD03 for any reason? I am still trying to learn how to read the compressor map I found for the TD03 which I don't know if applies to the TD03L4.

Last edited by Subninja; 07-09-2014 at 10:25 AM.
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      07-08-2014, 06:54 PM   #5
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I only have one in ear phone plugged in my ear but it sounds exactly like a blown turbo (main bearing failure). I've experienced this multiple times on other platforms/turbos. Loose hose connections sometimes cause similar sounds/no boost but I wouldn't put money on a loose hose (thats how it goes: "damn I hope its a lose connection...check all connections...f^uck its the turbo" been there done that). You have two turbos so I don't know why you would get NO boost unless the ECU is intervening (HIGHLY unlikely both turbos suffered bearing failure).
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      07-08-2014, 06:57 PM   #6
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wonder if it's a failed solenoid or something?
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      07-08-2014, 07:14 PM   #7
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no info... fingers crossed nothing serious! i would start with all connections
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      07-09-2014, 10:12 AM   #8
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Yeah it only does it when I would normally go into boost. I also noticed a "supercharger" sound after I flashed with the Cobb which makes me think they were already on there way out you know. My car is at 87,500 miles which really sucks so I will be footing the bill on this one all by myself. Awesome! Makes me kind of sad I got rid of my G37...lol.
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      07-12-2014, 03:02 PM   #9
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Plan to have them installed at the end of the month. I'll report the findings after the old turbos come off. I am sure lots of shaft play!
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      07-12-2014, 04:19 PM   #10
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Sucks.
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      07-12-2014, 05:01 PM   #11
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did you check you codes at least ??

it could be your boost solenoids?
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      07-20-2014, 12:34 PM   #12
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I just recently replaced both boost solenoids and all vacuums lines right after I got the car as a precaution. I don't think they would make it sound like that. It sounds just like this. So it is what it is.
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      07-20-2014, 12:37 PM   #13
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Only code I got was P300F which I would agree upon...lol.
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