Gauge needles jump at start up.

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Old 07-25-2010, 06:45 PM
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Default Gauge needles jump at start up.

So starting this morning, every time I start up my car, my gauge needles jump all the way to the right, then slowly go back down to the left, then go where they are supposed to. I also noticed that my miles driven keeps resetting itself to 0. Any ideas?
Old 07-25-2010, 06:50 PM
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Time for a new battery, mine was doing this, replaced the battery over a year ago and hasn't happened since
Old 07-25-2010, 07:05 PM
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Originally Posted by redta99
Time for a new battery, mine was doing this, replaced the battery over a year ago and hasn't happened since
I just replaced the old one with an expensive *** optima a few weeks ago...
Old 07-25-2010, 07:09 PM
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Could have a bad cell, thats what was wrong with mine, couldn't tell because it seemed to start fine, then about a month later it sounded weak, tested it, and said bad cell. It never hurts to have it tested, mine's an interstate megatron, not that it matters that they're both interstate, but mine was doing everything your describing.
Old 07-25-2010, 08:14 PM
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it's not doing it anymore... weird...
Old 07-25-2010, 08:53 PM
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Mine showed exactly those symptoms, and then they would go away, and then return. One morning, nothing. The engine would not even attempt to turn over. Put a new battery in and have not seen the symptoms again.
Old 07-25-2010, 08:55 PM
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Originally Posted by GR8RYD
Mine showed exactly those symptoms, and then they would go away, and then return. One morning, nothing. The engine would not even attempt to turn over. Put a new battery in and have not seen the symptoms again.
Well I have an Interstate Megatron II on standby, just incase. How do I go about getting a new one under the warranty?
Old 07-25-2010, 09:23 PM
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You shouldn't have a single issue with warranty since you just bought it, take it back to where you purchased it, and tell them what's going on, if you wanna be sure take it to any local parts store that tests batteries and ask for a print out, then if it is in fact a bad cell etc, return it.
Old 07-25-2010, 11:50 PM
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Make sure your ground cable is tight and both are makeing good contact.
Old 07-25-2010, 11:50 PM
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had same issue mine was just bad ground from battery up to frame the lil wire that comes off ground
Old 07-25-2010, 11:52 PM
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Beyond doubt it's a battery problem. I've had this several times in my 99Z (I've owned it since 2000, so have put a few batteries in it)
Old 07-26-2010, 01:09 AM
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Bouncing gauge needles = alternator problem.
New battery going bad prematurely = alternator problem.

I'd check your alternator, and the wires coming from it.
Old 07-26-2010, 08:00 AM
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This is a well known issue with '99 model year F-bods. My '99 did it too, whenever my battery wasn't in absolute tip top shape. Do a search and you'll find several threads about it that are a few years old.
Old 07-26-2010, 08:35 AM
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Originally Posted by Super-Bat
Bouncing gauge needles = alternator problem.
New battery going bad prematurely = alternator problem.

I'd check your alternator, and the wires coming from it.
It better NOT be my alternator! I just had THAT replaced a few months ago, along with my starter!




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