AFR difference between the banks

Mitco39

yes I did mean ECU sorry. Right but my concern would be once you start manually messing with the duty cycle of each cylinder how do you know that say you arent running lean on 2 cylinders and rich on the other one? I mean I guess you dont really know with the trim either, but atleast it is not a static value that you input and the ECU runs with as I would imagine setting the trim manually would be.

I am fairly new to the uprev side of things but I have been tuning engines for 4+ years with EFI Live and that would be one of the concerns I would have with manually setting trim values.

I agree that there is tolerances, its why you will only get rich and lean codes after the engine has exhausted its available trim values, but to me this is exactly what the trims should be doing, making sure each bank is running as closely as possible to the target AFR (whatever it is you are calling for).

Just my thoughts...

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