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what is causing this lean cold start *graph inside*

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Old 10-27-2006, 11:23 AM
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Default what is causing this lean cold start *graph inside*



Lots of coordinating trends but I don't know what's causing what.
I have quite a few other parameters logged so let me know if more info or a specific graph will help figure this out.

Thanks!!!!! The car is running pretty decent otherwise.
Old 10-27-2006, 12:13 PM
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http://www.forum.efilive.com/showthread.php?t=3170
Old 10-27-2006, 12:13 PM
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has to do with the fact we tune our cars for normal operating temperatures (180ish up) and do not account for the increased airflow during start up.
Old 10-27-2006, 01:02 PM
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According to what I read on the efi live thread, it will be all set when I plug the MAF back in.

I laughed when I visited that link since the original post looked identical to mine.
Thanks! I can't believe I'm actually getting somewhere on my tune finally.
Thanks thanks thanks!
SDAutotuner's: don't forget to zero your fuel trims with bidirectional controls before logging. I wasted like two months because of this
Old 10-27-2006, 06:51 PM
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Table A0014 in OS3 and later will take care of that for you as well.




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