Welcome to the North American Subaru Impreza Owners Club Tuesday September 16, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-28-2014, 11:30 PM   #1
no_name
Scooby Newbie
 
Member#: 400237
Join Date: Aug 2014
Location: St. Petersburg, Fl.
Vehicle:
2014 WRX
Blurple

Default Did anyone solve the non-turbo related acceleration whine?

2014 WRX
11500 miles

Alright, I've been at this for a while...searching everything and I haven't found my exact problem yet. Here it is. Acceleration whine. Sounds almost wire interference, like an energizing wire is causing feedback. (I'm not saying its electrical, the sound just resembles it). Its coming from the front of my car, I can hear it from the inside mostly at fourth and fifth gear whenever I push down the gas pedal. I can hear it bounce off things on the outside of my car when the windows are down, for example other cars and buildings. It goes away when I coast in and out of gear, and it is in the background as I accelerate past 3.5k when the turbo kicks in. It is independent of the turbo sound! It goes away when I let off the gas at any speed or rpm in 4th and 5th. It sounds like, bare with me, a high pitch, but low frequency rrrrrrreeeeeeeeeeeeeee. Almost like someone is muttering rrrreeeeee under his or her breath. Its constant and doesn't fluctuate under more or less load. Its not loud, but load enough for me to think something is wrong, or some improvement could be made.

I followed a thread that said that loose clamps on the intercooler and turbo were the cause. Tightened them, noise is still there. But now I have a whoosh sound when I build up pressure in my turbo and let off the gas..almost like a blow-off. Reguardless, Ive been under the hood, Id like to take it to the dealer and have them take a look but I dont wanna have them point the finger at me for a pre existing problem. Ideas?
* Registered users of the site do not see these ads.
no_name is online now   Reply With Quote
Old 08-29-2014, 01:05 AM   #2
Jubathoph
Scooby Newbie
 
Member#: 382959
Join Date: Feb 2014
Default

This is a common problem. The Malaysia plant that assembled your WRX had been infiltrated by a disgruntled band of out of work Cambodian child laborers. Some of them made it into your transfer case. The TSB is very clear on this issue. All you need to do is apply some window lubricant into your transmission fluid dip stick and you will be good to go.

Sent from my Nexus 5 using NASIOC mobile app
Jubathoph is offline   Reply With Quote
Old 08-29-2014, 01:23 PM   #3
Blown95ImpalaSS
Scooby Specialist
 
Member#: 87629
Join Date: May 2005
Chapter/Region: SCIC
Location: Ktown
Vehicle:
2013 Focus ST

Default

there is a pulley, I believe it;s an idler pulley, on the front of the ej257 cars that can go bad. my 04 sti sounded like it had a supercharger on it for a few days and I thought it was a boost leak as well, but it turns out the bearings inside the pulley had disintegrated and were generating this noise (and lots of heat too).

subaru oem was $190 or so but denso/oem replacement was about $50 at pep boys and took 5 mins to replace. your car sounds like it has much less mileage on it though - keep us posted.
Blown95ImpalaSS is offline   Reply With Quote
Old 08-29-2014, 03:44 PM   #4
Xcross
Scooby Newbie
 
Member#: 398970
Join Date: Aug 2014
Chapter/Region: South East
Location: The moon
Vehicle:
2014 wrx
WRB

Default

Video?
Xcross is offline   Reply With Quote
Old 08-29-2014, 07:07 PM   #5
Honda_K_Power
Scooby Newbie
 
Member#: 352666
Join Date: Apr 2013
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2013 WRX Premium
WRB

Default

One thing that I noticed is that if I have my stereo set to aux with a cable in or out and the stereo is on but nothing is playing, that it whistles through the speakers depending on my throttle, and gets louder when I accelerate and quieter when I decelerate.

Could this be it? I usually don't have that problem with the stereo off.
Honda_K_Power is offline   Reply With Quote
Old 08-29-2014, 07:21 PM   #6
jeffk182
Scooby Specialist
 
Member#: 150649
Join Date: Jun 2007
Chapter/Region: SCIC
Location: Irvine, CA
Vehicle:
2014 STI
DGM

Default

Quote:
Originally Posted by Jubathoph View Post
This is a common problem. The Malaysia plant that assembled your WRX had been infiltrated by a disgruntled band of out of work Cambodian child laborers. Some of them made it into your transfer case. The TSB is very clear on this issue. All you need to do is apply some window lubricant into your transmission fluid dip stick and you will be good to go.

Sent from my Nexus 5 using NASIOC mobile app
Normally, that would be a proper fix, but luckily our Subaru's don't have a transfer case

Sent from my SM-N900V using NASIOC mobile app
jeffk182 is offline   Reply With Quote
Old 08-30-2014, 09:20 PM   #7
no_name
Scooby Newbie
 
Member#: 400237
Join Date: Aug 2014
Location: St. Petersburg, Fl.
Vehicle:
2014 WRX
Blurple

Default

Thanks for the feedback. I'll try and get a video tomorrow on my way to work. Hopefully I can get the sound on my phone. And I'll definitely check out the idler pulley and aux cable. It be great if it was something simple.
no_name is online now   Reply With Quote
Reply

Thread Tools
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


All times are GMT -4. The time now is 06:44 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.