Quote:
Originally Posted by 135Pats
docs.google.com
LTFT= Long Term Fuel Trim
STFT= Short Term Fuel Trim
To be honest i'm not sure how the two correspond to each other, but I do know that if you run out of trim (34) you risk leaning out. AFRs look very stable in my log so that doesn't appear to be an issue here. And the LPFP appears to be struggling...but that's what I want to see what others have to say!
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STFT refer to the instantaneous correction to fuel output, while LTFT refers to corrections over a longer time.
For example, if your STFTs were sitting at 5% all the time, as in you adding fuel to hit your AFRs, then your LTFT would be 5% and stft would go to 0% and use that added 5% as base now.
This is at least how I understood a while back.
anyway STFT is what I look at and care about since like you said it pretty much sums up whether we are ok or not fueling wise and also how far of not being OK
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