ScanGauge O2 sensor values - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 11-23-2009, 05:51 AM   #1
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
Question ScanGauge O2 sensor values

When using an O2 sensor XGauge (from the XGauge examples PDF), the range is 0-99. How does one interpret the reading? What number would be stoich, which direction is lean/rich, and how far does it have to go before it's abnormally rich/lean?
__________________

__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 11-23-2009, 07:17 AM   #2
Registered Member
 
GasSavers_BEEF's Avatar
 
Join Date: Apr 2008
Posts: 1,831
I think jay did a lot with this to detect DFCO on his vehicle.

he may be a good resource
__________________

__________________
Be the change you wish to see in the world
--Mahatma Gandhi



GasSavers_BEEF is offline   Reply With Quote
Old 11-23-2009, 07:41 AM   #3
Senior Member
 
FrugalFloyd's Avatar
 
Join Date: Dec 2009
Posts: 383
Country: United States
Location: Bay Area, CA
If you want to display A/F ratio, it's worth investigating whether you can program an A/F xgauge. I was able to get one working on my CAN protocol Scion, but not with my (older)ISO protocol Nissan.

Unfortunately, the A/F display isn't very helpful. The leanest ratio I've seen so far in limited testing is 14.6:1. It goes to 18.9 with the engine off. I think I'll try this wideband oxygen sensor.
FrugalFloyd is offline   Reply With Quote
Old 11-23-2009, 08:06 AM   #4
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
I know I had an A/F XGauge working correctly once before, but I tried one yesterday and it didn't work. I was able to observe O2 data and I'd like to know what I saw.
__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 11-23-2009, 09:38 AM   #5
Site Team / Moderator
 
Jay2TheRescue's Avatar
 
Join Date: Sep 2008
Location: Northern Virginia
Posts: 4,657
Country: United States
Location: Northern Virginia
Arrow

I've tried the a/f xgauge, after a day or two I got bored with it. The number doesn't change much on my vehicle, maybe by .1 every once in a while. The O2 sensor reading will be 0 in DFCO. In most driving it will be in the 50's-60's. The highest I ever recall the reading being is 80 or 81.

-Jay
__________________






Jay2TheRescue is offline   Reply With Quote
Old 11-23-2009, 09:43 AM   #6
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
So when it was 80 or 81, was it rich or lean?
__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 11-23-2009, 11:35 AM   #7
Site Team / Moderator
 
Jay2TheRescue's Avatar
 
Join Date: Sep 2008
Location: Northern Virginia
Posts: 4,657
Country: United States
Location: Northern Virginia
Quote:
Originally Posted by theholycow View Post
So when it was 80 or 81, was it rich or lean?
THe higher the number, the richer the exhaust. For some reason the o2 reading spikes to 79 or 80 a fraction of a second before DFCO kicks in. I have no idea why though.
__________________

__________________






Jay2TheRescue 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Odometer help/suggestion waterboysh Fuelly Web Support and Community News 10 12-14-2012 04:38 PM
Tail pipe restrictor test GasSavers_Erik Experiments, Modifications and DIY 36 06-14-2008 07:09 PM
Someone scratched up my car!!! AMX General Discussion (Off-Topic) 2 06-07-2008 12:43 PM
Autotrader Archives bowtieguy General Discussion (Off-Topic) 2 12-28-2007 01:23 PM
New Japanese Crap Request Thread SVOboy General Discussion (Off-Topic) 10 07-01-2007 04:34 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 09:31 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.