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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 > Rattle or shudder on full throttle high RPM accel..



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      01-07-2011, 11:31 PM   #45
butters1234
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Drives: 335i
Join Date: Aug 2010
Location: USA

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Quote:
Originally Posted by rrobert22 View Post
Hey, I was wondering if anyone had experienced a noise or vibration upon full throttle acceleration above 4k with a JB3? I have had it with maps 3 and 4 of the 1.22 version, still out of town so havent got to try the other maps though..
No codes and runs like a scalded dog though.. No other mods
Thanks
Quote:
Originally Posted by sleepdoc View Post
Interesting. I have to say that I have had a sort of "groaning" noise at WOT high rpm's, like above 5500. Very tough to quantify or describe. It is not loud, and if I wasn't so critical about the car, I would not notice it. I have even wondered if it is just my imagination..

I did not notice it when I was running v2, pre 15k service. At some point after the BMW service, (supposedly no doomsday update), and v3 install, I began to perceive this noise. It does feel to me as if the car is being slightly held back, but that also could be my imagination. I ran at the track against another v3 car, and a JB3 car about a month ago, and there was really not much difference between the cars. I was even slightly faster.

Never a limp, Never a CEL.

Quote:
Originally Posted by Icyhot85 View Post
i get the same new Growl from my engine under wot with the new V3 installed.. I hope its naturall.. IM gunna take a vid tonight so i can show everyone!!! its so hard to describe
Quote:
Originally Posted by fotios335i View Post
I get the growl with my jb3 at high revs. I dont know what the hell it is but its coming from the far left side of the engine.Sometimes it seems like its coming from the drivers door and floorboard. It wont do it on the stock map though. I thought it was exhaust related then I thought I might be going crazy. I think I might try something different anyway and go with a new procede race.Ive never had one and Im thinking of finally trying it. Maybe the noise might go away..Who knows.
Vibration growling noise at high boost high rpms originating from the front left by the DCI with vibrations back to the center of the car. It doesnt feel like its harming the car, but its no were near as smooth as stock. Its not a shudder, as the doesnt shake, its just a high frequency vibration.

Any luck identifying what caused this? I have had these exact problems going on 2+ years on an SSTT, JB3 1.0, JB3 2.0, and V4. If i can sell my v4, I will give a flash a try.
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