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Air Fuel Ratio question..

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Old 10-06-2011, 09:15 PM
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Default Air Fuel Ratio question..

I got my VE and power enrichment pretty much laid out. Durring the day I noticed my wideband is reading about 12.5 WOT, while at night it is about 13.2. I would guess that this is do to DA and IAT. Thought the computer would compensate to stay the same. Any ideas why there is a night and day difference (excuse the pun.. lol)?
Old 10-06-2011, 09:47 PM
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The computer will not use trims at wot, are you speed density or maf?
Old 10-06-2011, 10:44 PM
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maf

so do you think it is the DA and IAT since the comp wont trim at wot?
Old 10-06-2011, 11:13 PM
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Yes, I think with variance with weather there will be some in afr.
Old 10-07-2011, 05:10 AM
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Same in closed/open loop?
Old 10-07-2011, 08:55 AM
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Did you calibrate the MAF?




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