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Old 11-20-2013, 12:24 PM   #1
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Battery voltage guage

It's been about 30 deg at nite here now so when i start her in the morning my guage looks like this but after about 10 min's driving comes back to a little right of the center mark...Is this what you guys who live in cold weather states see or is battery on way out?
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Old 11-20-2013, 12:30 PM   #2
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Looks normal to me. How new is your battery?
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Old 11-20-2013, 12:34 PM   #3
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Looks normal to me. How new is your battery?
Only a couple yrs,strange if i let it sit for a couple days in these temps then it's slow turning over...i'll have to get it tested i guess...
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Old 11-20-2013, 01:00 PM   #4
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My SS does the same thing. Even when the battery and alt was new. It will show charging 13.8 volts, when charging system was checked. Battery voltage is checked every time I get an oil change and every time they tell me the voltage is low. As long as I drive it every day engine turnover at start sounds normal speed. But if it sits for a day or 2, some times 3, which is just about every week ill get a slow engine turn over at startup. My SS has been like this since day 1.
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Old 11-20-2013, 01:12 PM   #5
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Yep, that's normal.
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Old 11-20-2013, 03:40 PM   #6
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Be glad yours stays that high, takes a really really good day for my LT alternator to do that. Normall its in the center and sometime a needle width under center but never has issues starting.

At road speed too LOL .... Also notice you have a V6 (120mph dash) when my camaro was a 3.8 it's alternator did what you describe as well and always hung out around where your is.

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Old 11-20-2013, 03:51 PM   #7
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I don't recall mine doing that in warmer weather....but never really noticed because it always started good even after sitting for a couple days.....
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Old 11-20-2013, 04:05 PM   #8
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I don't recall mine doing that in warmer weather....but never really noticed because it always started good even after sitting for a couple days.....
From what I remember when mine did have the 3.8 when started gauge would be at right about 13 volts, then go up. It would also drop when a/c turned on, defroster turned on or fans came on then would climb to where your picture shows.

Your fine, don't worry

I think the PCM will give a code anyways if there is a charging problem also the check gauges light will come on.
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Old 11-20-2013, 04:23 PM   #9
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i'm a ''if it aint broke don't fix it '' guy ...but i will be watching it...
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Old 11-20-2013, 04:45 PM   #10
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Mine is exactly like that.
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Old 11-20-2013, 05:30 PM   #11
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Batteries are more efficient when warm so your starter will draw more and your alt will have to charge more , your batt gauge is fine , its sitting in the normal range as long as it returns to just to the right of centre after I little while ,I would check your acid levels they may be a bit low, other than that your system seems fine.

I have a 67 with a new alt and battery and it does the same thing .
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