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 09-28-2011, 12:44 PM
processengr's Avatar
processengr processengr is offline
Registered User
Subaru Silver Contributor
 
Join Date: Feb 2007
Location: Conn.
Posts: 767
Registered SVX
Effect of bad IRIS checkvalve

Hi all,
I found the IRIS check valve on our 92 Ebony broken, wondering what effect this would have. Car is running well, except for slight hesitation right off of idle on very light throttle.
Taped it back together, but no change...
__________________
Cheers! Gordon
1997 Ebony #308 113k "The Black Diva"SOLD
1992 Black over Liquid Silver 152k SOLD
1992 Ebony 251k 444 SOLD
1999 Silver SLK230 134k SOLD
1997 Green Outback 137k SOLD
2013 Honda Accord I4 SOLD
2015 Subaru Crosstrek 30k
2018 Tesla M3 30k
Reply With Quote
  #2  
Old 09-28-2011, 05:25 PM
icingdeath88's Avatar
icingdeath88 icingdeath88 is offline
some sort of nerd. some sort.
Subaru Silver Contributor
 
Join Date: Aug 2009
Location: Tampa, FL
Posts: 3,560
Registered SVX
Re: Effect of bad IRIS checkvalve

You should be able to get another check valve at any auto parts store. Not having one is a vacuum leak whenever the IRIS solenoid is open. Plus, the vacuum tank not having vacuum due to no/bad check valve means that the IRIS butterfly won't be able to close, and the car will be lacking in low-end torque.
__________________
'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project

'97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod

Now a mod "over there" ............Photo album

Last edited by icingdeath88; 09-28-2011 at 05:40 PM.
Reply With Quote
  #3  
Old 09-28-2011, 05:36 PM
oab_au oab_au is offline
Registered User
Subaru Gold Contributor
 
Join Date: Mar 2001
Location: Coffs Harb, Australia.
Posts: 5,032
Significant Technical Input Registered SVX
Re: Effect of bad IRIS checkvalve

Quote:
Originally Posted by processengr View Post
Hi all,
I found the IRIS check valve on our 92 Ebony broken, wondering what effect this would have. Car is running well, except for slight hesitation right off of idle on very light throttle.
Taped it back together, but no change...
Hi Gordon, If broken, as in no connection, or broken as in won't hold vacuume in the tank, then the IRIS butterfly won't close for the Inertia system to work, and you will not have that good torque from 2200 to 4000, it wll just be in the Resonate system all the time to work from 4000 up..

Harvey.
__________________
One Arm Bloke.
Tell it like it is!

95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels.
97 Liberty GX Auto sedan. 320,000Kls.
04 Liberty 30R Auto Premium. 92.000kls.
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 09:12 AM.


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