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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 > How to shut off boost solenoids during engine running.



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      11-15-2012, 10:20 PM   #1
Bagelfast
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How to shut off boost solenoids during engine running.

Trying to get to the bottom of a buzzing sound at idle and 1k rpm..

Under the hood, its sounds like its coming from the front of the engine, maybe solenoid sides..

Is there anyway to shut the solenoids off safely, so i can cancel them out or determine if the solenoids are he culprit?
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      11-15-2012, 10:23 PM   #2
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Do you have a tuner? Check out my thread:

http://www.e90post.com/forums/showthread.php?t=768383

Hope it helps!
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      11-15-2012, 10:25 PM   #3
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Quote:
Originally Posted by Eric335
Do you have a tuner? Check out my thread:

http://www.e90post.com/forums/showthread.php?t=768383

Hope it helps!
Yea i have the G5 iso, im fbo with 28k miles..

I hear a buzzing sound in the car at idle to 1k rpm when revving in neutral. After 1k rpm it complete goes away.. Its annoying as hell..
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      11-15-2012, 10:34 PM   #4
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Quote:
Originally Posted by 1LUMI View Post
Yea i have the G5 iso, im fbo with 28k miles..

I hear a buzzing sound in the car at idle to 1k rpm when revving in neutral. After 1k rpm it complete goes away.. Its annoying as hell..
Makes me think it is not the solenoid. Take a look at this video i took, the solenoid didnt stop buzzing when i revved the engine:

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      11-15-2012, 10:35 PM   #5
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Could you just unplug the vacuum line that connects to the stock airbox? I left that unplugged one time, car reved fine, there just wasn't any boost, maybe that might help you out.
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      11-16-2012, 07:43 AM   #6
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It is the solenoids farting in the video as i had the same exact noise. My issues when I had it was the tune creating the wastegates to cause this buzzing and farting noise. Cars seem to be finicky with certain maps and for firmwares, but once I loaded a firmware that I knew didnt make this noise the buzzing stopped. Loaded the maps that had the buzzing noise and as soon I as started the car the buzzing came right back.
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Last edited by cn555ic; 11-16-2012 at 07:54 AM.
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      11-16-2012, 09:07 AM   #7
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JB4 has a valet mode, right? You can put it into valet mode with no boost. That should cut power to the solenoids. If no, then just unplug them.
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