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Old 12-12-2007, 08:24 PM   #4
madpogue
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Join Date: Sep 2004
Location: Madison, WI USA
Posts: 25,715
 

1996 SW2
Default Re: High Idle and rough running

I remember when the battery in my Colt finally gave it up, the alternator voltage at idle was lower. I suppose a seriously effed battery can pull more from the alternator, and at idle, burden it, thus making the idle slower/rougher.
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