Toyota Camry idles then dies
It is NORMAL for the engine computer to have to "Relearn" how to idle the engine after a battery replacement. This should only be temporary and will go away after a few trips.
If it does not go away, or if the Check Engine light is coming on, it will require diagnosis to determine the cause. Nobody can tell you if the problem is related to your recent work until the cause of the problem is located.
Poor idling and stalling on deceleration can be caused by anything from a bad Idle Speed Control motor (ISC)
to low fuel pressure (Clogged fuel filter, bad fuel pump) to a bad connection in the A/C clutch sensing circuit. (Kicks the idle up when the A/C compressor is running)
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