Toyota Yaris Forums - Ultimate Yaris Enthusiast Site


Go Back   Toyota Yaris Forums - Ultimate Yaris Enthusiast Site > Technical Forums > DIY / Maintenance / Service
  The Tire Rack

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 09-29-2013, 02:04 AM   #1
Neurotic Hapi Snak
Drives: 2011 Yaris 3dr
Join Date: May 2013
Location: MN
Posts: 39
Rich AFR

I have the AFR (commanded and measured) displayed on Torque when driving, and it displays the commanded AFR as 14.07:1 during closed loop. The measured AFR varying up to 14.07+/-.5. The only two examples I could find of AFR on a stock Yaris said it should be about 14.5-14.7. All I have currently is an AFE SRI, so pretty much stock. I live in Minnesota, so all gas is E10, an I was reading that stoich for E10 is 14.13, so this could be why my car runs a little rich. But it starts off at 14.07 right away, it doesn't start at 14.7 and adjust trim to 14.07. Does the Yaris have a sensor that senses ethanol content of the fuel? I've heard some cars have them, so the ECU adjusts for running on ethanol containing gas. Or is this something else? Anti-knock, but again, the car starts off at 14.07, it doesn't adjust to it.
Neurotic Hapi Snak is offline   Reply With Quote

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
A/F Ratio (AFR) Kaotic Lazagna General Yaris / Vitz Discussion 6 02-05-2011 11:14 AM
8 Drawbacks of Being Rich Kal-El Off-topic / Other Cars / Everything else Discussions 10 12-03-2010 01:18 AM
Another S/C'd member worried about his AFR LtNoogie Forced Induction Forum 183 04-18-2009 12:19 AM
AFR running extra rich at WOT? eTiMaGo Performance Modifications 15 03-10-2007 12:10 PM

All times are GMT -4. The time now is 09:43 PM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.