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Old 04-16-2011, 02:16 PM   #1
rnjj1219
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Default Bad Alternator?

I've been having a high idle issue and have replaced everything the forum has suggested. I thought it went away but it's reared it's head again. My battery was going on 5 years old so I replaced that as well. I put the volt meter on my battery last night and prior to starting it was 12.7v which seems normal. When I started the engine volts went up to 13.8v then gradually went down until it dropped just below 13.6v and the high idle kicked up bring the RPM up to about 1700. Very slowly (over 5-7 minutes) the volt meter went up to 14.25v which I believe it what it should be when idling normal. It stayed at 14.25 for a while then the idle went back to normal. I'm 98% sure it's a bad alternator but before I spend $130 I just wanted to check in and see what others thought.
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Old 04-16-2011, 02:29 PM   #2
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2002 SL2
Default Re: Bad Alternator?

It usually helps the sperts if you post year/specific model of the car.
...
2002 SL2 Manual - new in November, 2001
As of 09/30/17: 223,751 Miles - SOLD
New owner report of 08/08/19: 234,408 Miles

2013 Mazda 3 HB - new in October 2012
As of 11/12/20: 78,895 Miles
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Old 04-16-2011, 02:37 PM   #3
rnjj1219
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Default Re: Bad Alternator?

It's a 1997 Saturn SL, SOHC with manual transmission.
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