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Message: <blockquote data-quote="Game-R" data-source="post: 632243" data-attributes="member: 27709">Doubtful that can be the issue. If the battery can turn the starter motor, which consumes the most wattage of all the vehicle components, then it can supply more than enough for all the electronics in the car. If you suspect voltage to be the cause, take a closer look at your alternator and it's voltage regulator. Those play a bigger role than the battery when the engine is running. And even so, turning on and off high wattage components (headlights, AC) would easily recreate the hiccups you mentioned.Something just popped in my head while I was writing that: your car is an automatic, right? And the hiccups happen when your car is cruising and rarely at slow traffic? Possibility some communication problem between the gearbox and ECU?</blockquote>