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I've watched a couple of vids and I am of the understanding that percentage-wise, +/- 10% fuel trim is acceptable.
Now, I'm pretty sure the "zero mark" for binary is 128. But what are the acceptable limits before you start to worry about fuelling issues? And what is the approx. binary number at which a DTC will be set?
Thank you for any replies.
Basically the 128 number equals 100% and 12.8 deviatiion would be a 10% correction, ,either way. Smaller numbers indicate fuel is taken away - rich condition - and higher numbers than 128 indicate fuel is added to compensate for a lean condition.
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