The idle will be a bit erratic after a new battery as the ECU has to re-learn the engine's quirks. It's recommended that after anything that disconnects the battery you should go for a little drive (~10 miles)using all the gears and the full rev range, including a good bit of idling. If problems persist you've probably got some smut in your throttle body, get it cleaned!
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What is the point of genius if not applied to evil ends?
'Evil genius' just rolls off the tongue; 'humanitarian genius', that's just a mouthful!
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