The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A

Reply
 
Thread Tools Display Modes
  #1  
Old 01-10-2009, 07:47 AM
dannmarr's Avatar
dannmarr dannmarr is offline
I work for my SVX
 
Join Date: Jan 2005
Location: Pocono Lake, PA
Posts: 1,647
Registered SVX
Strange sound

While driving up hill I feel a stuttering, thumping, choking kind of sound. This happens only when I excellerate quickly up hill. This does't happen from a stand still, it happens when I let go of the gas to slow down, then press the gas to excellerate. The speed or the RPMs dont change while I feel it. If I press the gas slowly, it's smooth. Could it be the regular gas I've been using? Dirty injectors? Anyone had this experience?
Reply With Quote
  #2  
Old 01-10-2009, 07:34 PM
1986nate 1986nate is offline
Senior Member
Subaru Silver Contributor
 
Join Date: Sep 2008
Location: Meadville, PA-but I'll still travel
Posts: 4,672
Registered SVX
Re: Strange sound

Putting regular gas can cause the ECU to retard the timing but wouldn't think it would be that bad...Also how many miles as possibly could be due to a cat converter going bad... but again that would probably do it from stand still as well...
Reply With Quote
  #3  
Old 01-11-2009, 08:34 AM
dannmarr's Avatar
dannmarr dannmarr is offline
I work for my SVX
 
Join Date: Jan 2005
Location: Pocono Lake, PA
Posts: 1,647
Registered SVX
Re: Strange sound

I just hit 190K. The converter is about 2 years old. I'll check my codes.
Reply With Quote
  #4  
Old 01-12-2009, 01:08 AM
log1call log1call is offline
Registered User
 
Join Date: Jan 2009
Location: New Zealand
Posts: 62
Re: Strange sound

Sounds like the symptoms, "I feel a stuttering, thumping, choking kind of sound", should lead to it really. Wish I could drive/hear/feel it.
A miss doesn't cause those symptoms, nor does a fuel blockage really... well not unless they are really bad missing or fuel blockages. Have you done a tune up? Plugs, air and fuel filter?
Reply With Quote
  #5  
Old 01-12-2009, 01:39 AM
SoCal LS-L's Avatar
SoCal LS-L SoCal LS-L is offline
Avalanche Alcyoneer
Subaru Silver Contributor
 
Join Date: Sep 2008
Location: Reno, NV
Posts: 2,130
Registered SVX
Re: Strange sound

Sounds actually like misfire or preignition. You ARE using 91 octane right??
__________________
Chris

"A person convinced against their will, is of the same opinion still"

New?? Find the downloadable SVX Online Service Manual Here
RECOMMENDED READING for newer SVX owners Here some cool info if not fully accurate.
Reply With Quote
  #6  
Old 01-12-2009, 12:55 PM
1986nate 1986nate is offline
Senior Member
Subaru Silver Contributor
 
Join Date: Sep 2008
Location: Meadville, PA-but I'll still travel
Posts: 4,672
Registered SVX
Re: Strange sound

Quote:
Originally Posted by SoCal LS-L View Post
Sounds actually like misfire or preignition. You ARE using 91 octane right??
nope, he said he's using regular...
Reply With Quote
  #7  
Old 01-12-2009, 02:27 PM
SoCal LS-L's Avatar
SoCal LS-L SoCal LS-L is offline
Avalanche Alcyoneer
Subaru Silver Contributor
 
Join Date: Sep 2008
Location: Reno, NV
Posts: 2,130
Registered SVX
Re: Strange sound

Ahhh well priority one should be fill up with 91 octane and see if it goes away.... sometimes knock sensors dont work and wont retard the timing, resulting in the detonation you may be hearing. Yikes using regular 87 in a SVX is borderline criminal !!
__________________
Chris

"A person convinced against their will, is of the same opinion still"

New?? Find the downloadable SVX Online Service Manual Here
RECOMMENDED READING for newer SVX owners Here some cool info if not fully accurate.
Reply With Quote
  #8  
Old 01-24-2009, 11:54 AM
dannmarr's Avatar
dannmarr dannmarr is offline
I work for my SVX
 
Join Date: Jan 2005
Location: Pocono Lake, PA
Posts: 1,647
Registered SVX
Re: Strange sound

I filled up with Premium and the noise went away. I guess that's what 'knocking' sounds and feels like. Thanks for the inputs.
Reply With Quote
  #9  
Old 01-25-2009, 08:01 PM
SoCal LS-L's Avatar
SoCal LS-L SoCal LS-L is offline
Avalanche Alcyoneer
Subaru Silver Contributor
 
Join Date: Sep 2008
Location: Reno, NV
Posts: 2,130
Registered SVX
Re: Strange sound

Splendid Hopefully this knocking business did not go on too long. Your knock sensor must be dead, it should have given a signal to the ecu to retard timing. Shouldnt be a prob now just keep the 91 proof flowing.
__________________
Chris

"A person convinced against their will, is of the same opinion still"

New?? Find the downloadable SVX Online Service Manual Here
RECOMMENDED READING for newer SVX owners Here some cool info if not fully accurate.
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 -6. The time now is 05:52 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122