I saw somewhere if you clear all codes with the durametric it erases the long term fuel trim and then begins the process of relearning them. Maybe worth a shot? I did it one time while idling the car to clear a code and the car definitely started running differently the instant I cleared them. It seems like disconnecting the battery would clear everything as well. To readapt the egos I think you put the key in and turn to on and wait like a minute and then turn it back off, all without touching the gas.
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