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julex
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« Reply #15 on: May 23, 2011, 08:25:55 PM »
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Is it in this thread or some other one where somebody posted a bit of info which indicates that O2 readings below certain voltage (extra lean) will trigger a routine in ECU to dump the fuel as an emergency measure.
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Jason
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« Reply #16 on: May 23, 2011, 08:27:06 PM »
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That would make sense as voltage drops with lambda. I could flip the voltages around, so that rich = high and lean = low...
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ElementalVoid
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« Reply #17 on: May 23, 2011, 09:41:35 PM »
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Is it in this thread or some other one where somebody posted a bit of info which indicates that O2 readings below certain voltage (extra lean) will trigger a routine in ECU to dump the fuel as an emergency measure.
I think this thread is what you're thinking of: http://www.nefariousmotorsports.com/forum/index.php/topic,524.0.html |
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nyet
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« Reply #18 on: May 24, 2011, 01:38:15 AM »
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That would make sense as voltage drops with lambda. I could flip the voltages around, so that rich = high and lean = low...
Yup. That should do it if that is the problem |
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Jason
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« Reply #19 on: May 24, 2011, 11:35:14 PM »
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Well... it's not the wideband causing the fuel dump. It happened twice today with the narroband connected... now I get to figure out what is causing it.. hooray!
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Rick
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« Reply #20 on: May 25, 2011, 10:18:36 AM »
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Cars with EGT sensors I set BTS protection exactly the same as LAMFA. If things get too hot the sensors add the needed fuel. Maybe try changing the BTS maps to see if it is them. Is overboost related calibration ok, and no knock when this happens?
Rick
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nyet
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« Reply #21 on: May 25, 2011, 10:22:22 AM »
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I'm still thinking bad EGT sensors. This is a common problem and it doesn't always show up in logs.
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Jason
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« Reply #22 on: May 25, 2011, 10:41:58 AM »
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It's possible I guess... they have less than 10,000 miles on them though. I need to switch back to my tune since this was on Tony's file with the antilag mods, and see if I hit it again.
Hopefully I will have time to look at it this weekend. The overboost is likely due to the K16 hybrids and running Tony's K04 tune.
edit: forgot to mention no knock.
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« Last Edit: May 25, 2011, 11:14:55 AM by Jason »
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Jason
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« Reply #23 on: May 27, 2011, 11:31:43 AM »
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Woooo! It's leaning out bigtime in third gear, but is around 11:1 in first and second gear. Will fix and report back.
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IGA
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« Reply #24 on: April 04, 2017, 09:35:32 AM »
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So, finally is it the issue to connect Wideband to rear O2 sensor inputs ?
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BlackT
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« Reply #25 on: April 08, 2021, 05:59:59 AM »
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Any new input about this? I also want to log wideband on 2.7T
Is rear O2 good input?
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prj
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« Reply #26 on: April 08, 2021, 06:19:31 AM »
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I always used it, never had issues.
I have an external lambda on the dyno, and the reading matches both on the dyno as well as in the log when using the same factor.
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