Welcome to the North American Subaru Impreza Owners Club Monday July 28, 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 > Engine Management & Tuning

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 02-23-2004, 06:12 PM   #1
03WRX83
Scooby Specialist
 
Member#: 30246
Join Date: Nov 2002
Vehicle:
0394 WRX/Supra
WRB/White

Default Idle Fluctuation?

It seems when my car idles that it fluctuates, but not alot. You cant visually see it with the tach. But the exhaust note and engine make it seem like it is slightly going up and down(very slightly).

Is this normal.

My set up is cobb stage 2, catless, uppipe, gfb bov, kn filter.
* Registered users of the site do not see these ads.
03WRX83 is offline   Reply With Quote
Old 02-23-2004, 09:10 PM   #2
Don Arm
Scooby Specialist
 
Member#: 17520
Join Date: Apr 2002
Chapter/Region: MWSOC
Location: Indianapolis now Orlando
Vehicle:
2002 Impreza WRX
Midnight

Default

Mine has been doing the same thing recently. I really didn't notice the problem at first.
Probably the best thing to do is let Cobb know, which is what I'll be doing if it doesn't settle down over the next few weeks.

Don
Don Arm is offline   Reply With Quote
Old 02-23-2004, 10:26 PM   #3
03WRX83
Scooby Specialist
 
Member#: 30246
Join Date: Nov 2002
Vehicle:
0394 WRX/Supra
WRB/White

Default

yeah i will notify them also.. you notice how slight it is though, you can't really tell unless you really concentrate on it.
03WRX83 is offline   Reply With Quote
Old 02-23-2004, 11:45 PM   #4
BoostdBoxer
Scooby Newbie
 
Member#: 53163
Join Date: Jan 2004
Default

seems like a/f ratios are going haywire and your Computer is trying to compensate harshly. Did the same thing to me when I was venting to the atmosphere
BoostdBoxer is offline   Reply With Quote
Old 02-24-2004, 03:12 AM   #5
skywalker
Scooby Specialist
 
Member#: 1990
Join Date: Jul 2000
Location: San Diego, CA
Default

Well I have seen this with many cars that are Catless or have an aftermarket BOV.

The stock BOV works a little differently then all the aftermarket ones. So more than likely it might be a combination of the two. try switching the stock one back on and see what happens. if it is not that, then more than likley not haveing the backpressure the car is expecting a little bit, will also cause a slight fluctuation.

Cheers,
Bill Knose
Tuner I-Speed USA
skywalker is offline   Reply With Quote
Old 02-24-2004, 01:19 PM   #6
03WRX83
Scooby Specialist
 
Member#: 30246
Join Date: Nov 2002
Vehicle:
0394 WRX/Supra
WRB/White

Default

so is it okay for it to be doing this. Its so slight that no one else can tell. Or i just might be imagining things.
03WRX83 is offline   Reply With Quote
Old 02-24-2004, 03:44 PM   #7
03WRXMA
Scooby Guru
 
Member#: 35081
Join Date: Apr 2003
Chapter/Region: NESIC
Location: CT
Vehicle:
2012 WRX
WRB

Default

Its the nature of the beast, nothing to be worried about.

FWIW it prob. did it when it was stock, you just couldnt hear it.
03WRXMA is offline   Reply With Quote
Old 02-24-2004, 04:54 PM   #8
Angulimala
Scooby Newbie
 
Member#: 43814
Join Date: Sep 2003
Location: Sugar-Lander (Houston Tx. USA)
Vehicle:
2004 WRX Wagon
Silver, SPT exhaust

Default

I'm thinking 03WRXMA hit it on the head...

My wagon's idle fluctuates a bit ... but i didn't notice until I got the SPT exhaust installed.
Angulimala is offline   Reply With Quote
Old 02-25-2004, 04:31 AM   #9
skywalker
Scooby Specialist
 
Member#: 1990
Join Date: Jul 2000
Location: San Diego, CA
Default

I know my RS back in 99 was so quiet I couldn't even tell it was running. As the years went buy it got rougher and rougher. Things wear out and like 03WRXMA said, it is the nature of the beast. Nothing to worry about.
skywalker 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
idle fluctuation on 05 wrx Hard Body Factory 2.0L Turbo Powertrain 2 03-17-2009 05:40 PM
89 XT GL Wild Idle fluctuation myxtgl 'Old School' Subaru Forum 4 11-19-2008 11:42 AM
Fluctuating Idle? JerryDodrill Normally Aspirated Powertrain 17 05-22-2008 06:10 AM
Idle fluctuating at startup and at a roll! Fuel cutoff at 5k.. joelikewhoa Factory 2.0L Turbo Powertrain 9 02-28-2008 04:51 PM
idle fluctuations wil06STI Factory 2.5L Turbo Powertrain 13 10-03-2007 09:35 PM


All times are GMT -4. The time now is 11:29 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.