 Apexi tt, ?? |
  Apr 22 2004, 04:46 PM
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#1
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 Beginner  Group: Members Posts: 47 Joined: 22-April 04 From: Bloomington Member No.: 278  |
Hey guys new to your forum, some may know me from CII but i have a question about my new tt. I was wondering what numbers I should be seeing for my A/F and o2. right now the A/f stay pretty constant but my o2 number bounces around everywhere at idle. just thought i would see what you may see. Thanks
jordan 
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Replies
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Apr 22 2004, 04:51 PM
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#2
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 DSM Chick Group: Members Posts: 333 Joined: 16-April 03 From: east peoria IL Member No.: 114 |
from what I can recall (and I wouldn't put any stock in this info) that is pretty normal.......ours did that too...of course it could have be installer/operator error too though
 oh, and welcome to the board!
-------------------- Bowen Michael Anderson 4/22/05
Baby Luke due 2/09/09 |
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Apr 22 2004, 04:57 PM
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#3
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 Zen Master DSM Group: Moderators Posts: 3,008 Joined: 10-January 01 From: in front of you Member No.: 5 |
Katie is right. Its normal.
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Apr 22 2004, 05:01 PM
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#4
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DSM Chick Group: Members Posts: 333 Joined: 16-April 03 From: east peoria IL Member No.: 114 |
isn't it due to the constant re-adjusting of the ratios?
-------------------- Bowen Michael Anderson 4/22/05
Baby Luke due 2/09/09 |
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Apr 22 2004, 05:05 PM
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#5
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Zen Master DSM Group: Moderators Posts: 3,008 Joined: 10-January 01 From: in front of you Member No.: 5 |
Yep, the O2 trim is always trying to keep the fuel ratio stoichmetric in closed-loop mode to maintain good power and gas mileage.
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Apr 22 2004, 07:32 PM
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#6
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 Post Master Group: Members Posts: 774 Joined: 28-October 02 From: Pekin Member No.: 32 |
Closed loop = bouncy-bouncy.
-------------------- 2009 Scion Tc
1994 Del Sol Si 1991 Talon TSi AWD 1990 Mustang GT FOR SALE!!! |
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Apr 22 2004, 10:29 PM
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#7
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 Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
I like the way Taboo on DSMtalk put it. Tuning by narrowband O2s is about as worthwhile as tuning by battery voltage. I say use it as a ballpark only. If your going to tune, use timing advance and knock counts. We do all know from my car though, .98 on a narrowband is really rich
 If your seriously wanting a number, you'll probably find best results between .86-.94. That's the best I can give you. Like I said though, I wouldn't go by it.
-------------------- GVR4 866/1000 = the perpetually broken car
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Apr 23 2004, 08:51 AM
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#8
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Beginner Group: Members Posts: 47 Joined: 22-April 04 From: Bloomington Member No.: 278 |
well i played with it last night and the A/F sits around 14.5 and the o2 reads all over until you hit wot than shit will hit a constant number usually pretty high i think it was in the 9's. so yeah she is pretty rich. thanks for the feedback. and there will be no tuning with this.
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