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.:mad: 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.

Is it bad at all loads/rpms or just specific areas?

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?

what is your knock correction?
Sounds like the ECU doesn't like your tuning choices and is trying to save the motor.

Larry

what is your knock correction?
Sounds like the ECU doesn't like your tuning choices and is trying to save the motor.

Larry

I would normally agree with you, but this is not my tunning now it SOA's tunning.

KC values range from 6 - 12 under WOT.

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).

The data in the column labelled "Air/Fuel Correction #1 (%)" have an interesting range, from -25 to +25. I doubt that's valid.

']The data in the column labelled "Air/Fuel Correction #1 (%)" have an interesting range, from -25 to +25. I doubt that's valid.

Without looking at the log thats a perfectly valid range. Once it settles on a value it sets that into the long-term fuel trims and starts over at 0 again.

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.

And having taken a look at the learning values, they are PERFECTLY normal for a stock airbox.

Thats what I like to hear. Thanks for taking a look guys.