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03-27-2006, 03:31 PM | #1 |
Scooby Newbie
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Vehicle:2016 WRX WR Blue |
Air Fuel Learning (Long Term Fuel Trim?)
Over the past few months I have been tunning my car using the Openecu tools. After flashing a new tune everything goes just fine and then after a few days the car starts pulling timming. It was suggest by someone that I take a look at the Air/Fuel learning, which from what I understand should be -/+ 5%, anything more requires attention (Correct me if I'm miss informed). My vaules range up to +7%.
I suppose my question is, does this require attention and if it does, where should I look for a problem. I've search, and I really can't find much related to Air/Fuel Learning or Long Term Fuel Trim. At this point I'm rdy to rip my hair out, everytime the car is running good (or great), it only takes a few days for it to be ruined. Any ideas about how to track down this problem would be a great help. Thanks 04 WRX Uppipe Downpipe Stock image (with OL/CL fixes). If any other info is needed, logs ect, let me know and they can easily be provided. |
03-27-2006, 04:11 PM | #2 |
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Is it bad at all loads/rpms or just specific areas?
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03-27-2006, 04:15 PM | #3 |
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Not quite sure what you mean? Is it pulling timming bad at certian spots/load points or is the Fuel trim bad at certian load points?
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03-27-2006, 04:29 PM | #4 |
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what is your knock correction?
Sounds like the ECU doesn't like your tuning choices and is trying to save the motor. Larry |
03-27-2006, 04:34 PM | #5 | |
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Quote:
KC values range from 6 - 12 under WOT. |
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03-27-2006, 04:39 PM | #6 |
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http://www.computercablestore.com/log.csv
Thought this would make it easier, sorry about the size of the log. It was my drive home for lunch today (which I was looking for A/F learning). There are a WOT (not the best but should give you the idea). |
03-27-2006, 06:14 PM | #7 |
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The data in the column labelled "Air/Fuel Correction #1 (%)" have an interesting range, from -25 to +25. I doubt that's valid.
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03-27-2006, 07:15 PM | #8 | |
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03-27-2006, 10:42 PM | #9 |
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You would not see that value with a stock airbox and a properly functioning car.
Those are the MAX values for that parameter. It can't correct anymore than that. edit - nevermind i was thinking you were talking about the Learning values. And having taken a look at the learning values, they are PERFECTLY normal for a stock airbox. |
03-28-2006, 08:34 AM | #10 | |
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