Subject	A/F alpha at idle is 109 but wideband is rich. Confused.
Posted by	treese88 on June 01, 2012 at 8:56 PM
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Message	From what I understand if A/F alpha is above 100 that means there is a lean condition and the ecu has to adjust and add fuel. Which makes these readings seem to contradict eachother. As far as I can tell I am rich at idle so a/f alpha should be 100 or less. Idle: Both my o2's stick around .8v and do not bounce. A/F alpha is 109 on both sides. Wideband afr is ~13.2. Idle with a/c on: o2's drop to like .1v, a/f alpha 100 both sides. wideband 14.5. My idle is smoother with the a/c on. Cruising: ~14.5 a/f, bouncing o2's, alpha I haven't checked. So...what is going on here? Please school me. '91 TT
Follow Ups	A/F alpha at idle is 109 but wideband is rich. Confused. - treese88 20:56:30 06/01/12 Maybe I don't understand your question... - beanz 19:01:36 06/02/12 I guess I am wondering why the ecu would be adding - treese88 21:04:44 06/02/12 Re: I guess I am wondering why the ecu would be adding - MaxxAction 21:10:12 06/02/12 No I've been storing the car awhile and just starting to - treese88 21:18:25 06/02/12 Re: I guess I am wondering why the ecu would be adding - MaxxAction 21:14:33 06/02/12 Normal. Idles at about 175. All readings from sensors are - treese88 21:22:07 06/02/12 Re: Normal. Idles at about 175. All readings from sensors are - MaxxAction 23:43:36 06/02/12 Re: Normal. Idles at about 175. All readings from sensors are - MaxxAction 23:44:56 06/02/12 Synced. Plugs have less than 300 miles and come from - treese88 09:38:44 06/03/12 Re: Synced. Plugs have less than 300 miles and come from - MaxxAction 11:28:22 06/03/12 your nb lambdas may be on their way out (n/m) - kickerzx 12:14:23 06/03/12 Just want to bump this. Are you saying my wideband sensor - treese88 08:11:10 06/05/12 Nismo 740cc. Thought I had updated my profile. Oops. - treese88 16:06:20 06/03/12
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