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01-01-2021, 07:02 PM
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#1 |
 Drives: firebird Join Date: Jan 2010
Location: valdosta, georgia
Posts: 155
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Showing lean by like 37%
Did some tuning to try and tune my MAF. I did a couple wot runs and between 7000-7750 Hz I am getting a lamba of like 1.37 so thats 37% lean. Why would a stock vehicle be that lean, the commanded was .85? Almost seems like it didn't go into PE but i didn't change anything regarding that, only the stuff so I can tune MAF
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01-01-2021, 08:23 PM
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#2 |
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Drives: firebird Join Date: Jan 2010
Location: valdosta, georgia
Posts: 155
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Oh, its a 2017 SS. All stock except for secondary cats removed, and e85 sensor kit
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01-03-2021, 09:44 PM
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#3 |
 
Drives: 2017 Chevrolet Camaro SS Join Date: Jul 2020
Location: Houston, TX
Posts: 31
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Do you have a log and tune file we can see?
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01-04-2021, 12:40 PM
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#4 |
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Drives: firebird Join Date: Jan 2010
Location: valdosta, georgia
Posts: 155
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I will see what i can post later, i am gonna do some logging again today
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01-04-2021, 06:41 PM
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#5 |
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Drives: firebird Join Date: Jan 2010
Location: valdosta, georgia
Posts: 155
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I forgot, i use efilive so you guys probably cannot look anyways but if you tell me what tables you need i can take screenshots. I made the error adjustments it had last time and it richened it up quite abit, more towards commanded. Just don't know why it would have been that lean as i thought from the factory they were rich for safety.
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01-05-2021, 09:25 AM
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#6 |
          
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,827
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It's normal to get a very short lean spike when the engine transitions from closed loop to PE mode. You can make it go away by commanding PE mode to enable sooner but then you will go rich and enter PE mode under some part throttle conditions that don't need that much fueling. I have found the fueling to be more consistent and stable with a short lean spike on transition.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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01-05-2021, 10:22 AM
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#7 |
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Drives: firebird Join Date: Jan 2010
Location: valdosta, georgia
Posts: 155
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Wasn't really a short lean spike, it was over numerous Hz ranges.
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01-09-2021, 06:58 AM
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#8 |
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Drives: firebird Join Date: Jan 2010
Location: valdosta, georgia
Posts: 155
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Nobody has logged a stock 6.2L in MAF only mode? I would like to see of this has happened to anybody else too.
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