Welcome to the North American Subaru Impreza Owners Club Thursday November 27, 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 > Normally Aspirated 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 08-28-2012, 07:28 PM   #1
Pickler
Scooby Newbie
 
Member#: 301247
Join Date: Nov 2011
Location: Toronto
Vehicle:
09 Impreza 2.5i MT
White

Default wierd sound under load

when engine is under heavy load at low rpms (1000-3000) it makes a funny rumbling sort of noise. this is made worst if the AC is on or the outside temprature is hot. i use scangauge 2 to monitor engine load mpg etc and i noticed this noise comes up when engine load hits 99% (max load). this doesnt happen under full throttle. anyone experienced this with the 2.5L?
Pickler is offline   Reply With Quote
Old 08-30-2012, 03:24 AM   #2
dirt and road
Scooby Newbie
 
Member#: 293284
Join Date: Sep 2011
Chapter/Region: NWIC
Location: Pullman WA
Vehicle:
2005 2.5 RS
grey meta

Default

Im pretty sure its normal man mine gets really loud around 3k its just the boxer motor. Its definitely louder with the windows up. Nothing to worry about as far as i know, put an exhaust on it and you'll forget about the engine noise.
dirt and road is offline   Reply With Quote
Old 08-30-2012, 09:45 AM   #3
GrundleJuice
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: stupid Florida
Vehicle:
2007 No YELLING
on the bus!

Default

Quote:
Originally Posted by Pickler
when engine is under heavy load at low rpms (1000-3000) it makes a funny rumbling sort of noise. this is made worst if the AC is on or the outside temprature is hot. i use scangauge 2 to monitor engine load mpg etc and i noticed this noise comes up when engine load hits 99% (max load). this doesnt happen under full throttle. anyone experienced this with the 2.5L?
log knock correction or total timing angle or whatever you can monitor as far as ignition timing. It may be knock since knock is more likely to occur when intake air temps are higher and when load is higher (I.e. when the a/c is on)
GrundleJuice is offline   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 01:54 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.