S2000 Forced Induction S2000 Turbocharging and S2000 supercharging, for that extra kick.

normal for o2 sensor to idle at 10.1 AFR?

Thread Tools
 
Old Jan 9, 2011 | 06:01 PM
  #1  
vietdragontekx's Avatar
Thread Starter
Registered User
 
Joined: Mar 2008
Posts: 977
Likes: 0
From: San Diego
Default normal for o2 sensor to idle at 10.1 AFR?

was looking at my O2 #1 AFR on AEM EMS power tuner problem with the car idling and it show 10.1, is that a normal reading?
Reply
Old Jan 9, 2011 | 06:43 PM
  #2  
Deception's Avatar
 
Joined: Apr 2009
Posts: 6,036
Likes: 4
From: FAR BEYOND THE WHEEL...
Default

if your sensor is accurate, then its really rich at idle.
When had RC injectors, anything higher than 10.5 , sometimes 12 AF at idle would misfire. When I got ID injectors it idled at 14.5-16 without issue.
Reply
Old Jan 10, 2011 | 03:33 AM
  #3  
Spec_Ops2087's Avatar
 
Joined: Sep 2003
Posts: 10,301
Likes: 18
From: New Jersey
Default

I idle and cruise out of boost around 13.5. 10 is stupid rich.
Reply
Old Jan 10, 2011 | 09:15 AM
  #4  
s2000Junky's Avatar
Community Organizer
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jun 2007
Posts: 31,070
Likes: 566
Default

Yeah fuel wash rich. Idle target should be 14.7. It will normally sweep between low 14's and mid 15's. If your idling under 14 your wasting fuel.
Reply
Old Jan 10, 2011 | 09:33 AM
  #5  
S2000_FUN's Avatar
Community Organizer
 
Joined: Jun 2007
Posts: 8,607
Likes: 2
Default

Originally Posted by Spec_Ops2087,Jan 10 2011, 04:33 AM
I idle and cruise out of boost around 13.5. 10 is stupid rich.


You can idle also above 14 but at least in my car at 14.5 that it was at the beginning it was missfiring at idle.
Reply
Old Jan 10, 2011 | 09:34 AM
  #6  
s2000Junky's Avatar
Community Organizer
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jun 2007
Posts: 31,070
Likes: 566
Default

Originally Posted by S2000_FUN,Jan 10 2011, 10:33 AM


You can idle also above 14 but at least in my car at 14.5 that it was at the beginning it was missfiring at idle.
Crappy injectors and or too low of an idle pressure to get proper atomization.
Reply
Old Jan 10, 2011 | 09:57 AM
  #7  
KwikyMAN's Avatar
Registered User
 
Joined: May 2009
Posts: 220
Likes: 0
From: 30518
Default

i can't think of a time you would ever wanna hit 10:1....lowest i would ever go is 10.8:1 A/F....
Reply
Old Jan 10, 2011 | 10:01 AM
  #8  
FullBlown's Avatar
Former Sponsor
 
Joined: Nov 2008
Posts: 727
Likes: 0
Default

Originally Posted by vietdragontekx,Jan 9 2011, 07:01 PM
was looking at my O2 #1 AFR on AEM EMS power tuner problem with the car idling and it show 10.1, is that a normal reading?
Is it calibrated correctly on the AEM? Do you have a gauge or just an inline wideband?
Reply
Old Jan 10, 2011 | 10:20 AM
  #9  
s2000Junky's Avatar
Community Organizer
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jun 2007
Posts: 31,070
Likes: 566
Default

Originally Posted by KwikyMAN,Jan 10 2011, 10:57 AM
i can't think of a time you would ever wanna hit 10:1....lowest i would ever go is 10.8:1 A/F....
Reply
Old Jan 10, 2011 | 10:30 AM
  #10  
itlynstalyn's Avatar
Registered User
 
Joined: Aug 2007
Posts: 1,300
Likes: 0
Default

What injectors are you running? My RC550's idle at around 12.7-13.5 at times. It's pretty annoying.
Reply



All times are GMT -8. The time now is 02:09 PM.