Quote:
Originally Posted by NewArt
Please define "handover".
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Its a term used to define a "reboot" of the ECU. Google it for details.
Basically if you do a ton of work to an engine that has a few small issues that the fuel trim has been "masking" the ECU doesn't know when those items are corrected. It will continue to "adapt" to the prior conditions, and it does this through fuel trim primarily.
A handover will reset the adaptive and your fuel trim values will be accurate for the current engine conditions, otherwise you are looking at the past.