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Old 10-06-2018, 01:18 PM   #11
G-Na$ty
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Join Date: Aug 2018
Drives: 2016 FRS
Location: Dallas
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Quote:
Originally Posted by extrashaky View Post
It's normal.

How old is your battery? I ask because my rough idle smoothed out some when I replaced the garbage OEM battery. Mine used to stumble when I turned the headlights on, and the rough idle with A/C blowing was more pronounced when the lights were also on. After replacing the stock battery with an AGM, the extra stumble from putting a load on the alternator disappeared immediately.


My battery is about 4 months old so I don't think it's due to that. Haven't tested it though...
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