N54Tech.com - International Turbo Racing Discussion
Mubiiii Mubiiii is offline
New Member
Posts: 3
Join Date: Jun 2019
Car: 2010 bmw 335xi n54
Default 335i 30ff horn/trumpet noise (with audio) - 08-10-2019, 11:07 PM

Link to noise:
335i boost leak horn noise - YouTube

Ever since i removed my cowl and cabin air filter, I've gotten a really weird noise from under my hood (sounds like its coming from the surface level under the hood). This noise only occurs under hard acceleration and i get immediate power loss (car doesnt pull as much). Sound does not come when i rev the car in park. I changed all my vacuum lines, checked some of my connections (throttle body, cp, intake manifold). I just got a new boost solenoid and I am going to test if any of my 2 solenoids are bad.

Please let me know if there's other things i can test and check.
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2020, N54tech.com