Perth-WRX.com  

Go Back   Perth-WRX.com > General WRXing > General Subaru Discussion
Register Diddy Kart ArticlesAll AlbumsBlogs FAQ Members List Calendar Search Today's Posts Mark Forums Read


Welcome to Perth-WRX, click here to register!

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 27-07-2009, 04:05 PM
OllieJ's Avatar
DCCD Donut Driver
Member
 
Join Date: May 2006
Location: SOR
Posts: 129
Thanks: 0
Thanked 0 Times in 0 Posts
OllieJ at standard level
Default Verso and bung O2

If I had a Verso tune completed with a bung Oxygen Sensor and hence was running stupid rich, should I expect the car to lean out once the O2 is replaced or will it contine to run rich due to the Verso tune?
__________________
MY08 Liberty Tuned by STI Wagon
Reply With Quote
  #2  
Old 27-07-2009, 04:24 PM
tuna's Avatar
Sign me up!
Why stop at two bar?
 
Join Date: Jul 2005
Location: Where horsepower is cool again.
Posts: 5,570
Blog Entries: 5
Thanks: 7
Thanked 107 Times in 50 Posts
tuna is a gurutuna is a guru
Default

why not just replace the sensor?
__________________

Long live the WRC
Reply With Quote
  #3  
Old 27-07-2009, 04:31 PM
OllieJ's Avatar
DCCD Donut Driver
Member
 
Join Date: May 2006
Location: SOR
Posts: 129
Thanks: 0
Thanked 0 Times in 0 Posts
OllieJ at standard level
Default

I have... just need to know if it needs a re-tune to lean out.
__________________
MY08 Liberty Tuned by STI Wagon
Reply With Quote
  #4  
Old 27-07-2009, 05:31 PM
Jim621's Avatar
Sir AntiLag
Member
 
Join Date: Apr 2008
Location: Perth
Posts: 453
Thanks: 1
Thanked 0 Times in 0 Posts
Jim621 at standard level
Default

Mate, they use a wideband O2 sensor when they tune the car....so changing the standard O2 sensor shouldnt matter.
__________________
Long live the Classic!
MY99 - 245hp & 360Nm.......Best ET - 12.771s
Reply With Quote
  #5  
Old 01-09-2009, 10:01 PM
jOh4n's Avatar
WRX Hi Five Club
Member
 
Join Date: May 2008
Location: Murdoch
Posts: 200
Thanks: 0
Thanked 0 Times in 0 Posts
jOh4n at standard level
Default

thread hi-jack:

is a 02 sensor still needed on a ej20 running a aftermarket ecu (ie possumLink ecu)?
reason i ask is because i have apexi turbo timer with a functioning air/fuel ratio meter on it and lately i have noticed the a/f ratio readings are all over the shop on light throttle (ie sometimes is will read up to 20:1, then jump up and down, only on light throttle)

i believe that the turbo timer gets its a/f readings from the o2 sensor, so am i right to think that these erratic readings are due to a faulty o2 sensor?
Reply With Quote
  #6  
Old 01-09-2009, 10:15 PM
Rossco's Avatar
Perth WRX Old Skool Cool Dude
Member
 
Join Date: Apr 2007
Location: Perf, NOR
Posts: 5,467
Blog Entries: 11
Thanks: 54
Thanked 100 Times in 79 Posts
Rossco is a guruRossco is a guru
Send a message via MSN to Rossco
Default

lean cruise is fine on light throttle....it hunts around because the o2 is doing it's job.

it will go to 20:1 on over-run as the ecu cuts the fuel as you coast to a stop in gear with the throttle closed.
__________________
[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]
Reply With Quote
  #7  
Old 01-09-2009, 10:47 PM
jOh4n's Avatar
WRX Hi Five Club
Member
 
Join Date: May 2008
Location: Murdoch
Posts: 200
Thanks: 0
Thanked 0 Times in 0 Posts
jOh4n at standard level
Default

cheers for that Ross. i have never had a look at the readings when i am on WOT, however i am aware that those turbo timers and their a/f readings are not exactly accurate since its not reading off a wide band o2 sensor.

is there a method to check if an o2 sensor is still working fine? i have noticed my fuel economy has become worse of late, and since i have never seen these kinds of erratic readings on the a/f meter before i am still suspecting the o2 sensor may be faulty..
Reply With Quote
  #8  
Old 02-09-2009, 06:55 AM
Jim621's Avatar
Sir AntiLag
Member
 
Join Date: Apr 2008
Location: Perth
Posts: 453
Thanks: 1
Thanked 0 Times in 0 Posts
Jim621 at standard level
Default

Hi John,

As you said, the standard O2 sensor (narrowband sensor) can only tell if the AFR is richer or leaner than 14.7:1....it doesnt know how much richer or leaner. so disregard the readings your meter readings you are getting.

If your fuel economy is getting worse, this is usually a sign that your O2 sensor is on its way out. O2 sensors start to read 'lean' when they fail, so will then pump more fuel into the engine - hence the worse economy.

i believe most O2 sensors only last 50,000kms, when was the last time you changed yours?


one more thing to check, is your possumlink in a closed or open loop lamda?
if its open loop, the O2 sensor wont be doing anything. so you might have a problem elsewhere.

cheers, Steve
__________________
Long live the Classic!
MY99 - 245hp & 360Nm.......Best ET - 12.771s
Reply With Quote
  #9  
Old 02-09-2009, 07:06 AM
Rossco's Avatar
Perth WRX Old Skool Cool Dude
Member
 
Join Date: Apr 2007
Location: Perf, NOR
Posts: 5,467
Blog Entries: 11
Thanks: 54
Thanked 100 Times in 79 Posts
Rossco is a guruRossco is a guru
Send a message via MSN to Rossco
Default

99-00 Afm's fail with little provocation!

What air filter is on the car?
__________________
[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]
Reply With Quote
  #10  
Old 02-09-2009, 12:23 PM
Jim621's Avatar
Sir AntiLag
Member
 
Join Date: Apr 2008
Location: Perth
Posts: 453
Thanks: 1
Thanked 0 Times in 0 Posts
Jim621 at standard level
Default

Possumlinks use the MAP sensor....so it shouldnt matter if his MAF is stuffed.
__________________
Long live the Classic!
MY99 - 245hp & 360Nm.......Best ET - 12.771s
Reply With Quote
Reply

Tags
bung, o2, scoobygez likes it in the 02 bung, verso

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
06 or 07 with verso and TBE Chris General Subaru Discussion 53 10-08-2009 08:10 PM
m18x1.5 20-30mm bolt/bung. Elrico Wanted 7 18-07-2009 09:29 PM
verso??? k.j.d Mechanicals 12 22-04-2009 08:51 PM
A good reason to make sure you put the bung in your boat (pics inside!) Mat Non-WRX Discussion 15 05-04-2007 02:20 PM
Bung eye drivers! Shauno General Subaru Discussion 17 08-12-2006 09:18 AM



Welcome to Perth-WRX, click here to register!

All times are GMT +8. The time now is 06:44 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO