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Batt going dead in one week???

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Old Sep 5, 2001 | 07:18 AM
  #1  
88ROC's Avatar
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From: Hooksett NH USA
Batt going dead in one week???

Hello fellow camaro owners..wonder if you can help me out.I put a new batt in a week ago..now its dead..and there's no draw.Its a 88 350 TPI . a buddy of mine has a 96 and his too went dead after 2 weeks of purchase.now seeing how these vehicles WERE sitting for that time not starting..is this normal for a batt to go dead in a week or two??? in F-bodies???/ any body else have this problem.I know heat does a job on them,but these cars were in temp storage in a dry climate,indoors...again..no draw either. ECM pulling too much juice for mem????...lol..(don't know)

thanks for your help.

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Old Sep 5, 2001 | 09:30 AM
  #2  
Stuart Moss's Avatar
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From: Warrenton, VA U.S.A.
There are many factors why this could be.

I can think of three very important questions that I would need the answers to in order to make an intelligent guess as to the problem(s).

1. What is the condition of the battery? (Although a new battery will probably be in good condition, that is no guarantee.)

2. What was the state of charge (specific gravity) of the battery when the car was last turned off?

3. Exactly how much current is being drawn with the car off?

As mentioned above, new batteries can go bad quickly due to a variety of reasons, such as being undercharged or overcharged, too many deep discharges (e.g. leaving the lights on), too much vibration, and so forth. I think the most common reason for a new battery to die quickly is due to being too hot and losing electrolyte, such as from being overcharged.

The parasitic load on my '91 Camaro is ~27mA (0.027 amperes). This is the load that the ECM and alarm draw while the car is off (the radio memory is off my rear battery, and is essentially an insignificant amount).

My car will start right up after sitting for two months.

What you described is certainly not normal, adn as you can see, could be many reasons why the battery failed.

If you cannot test the battery yourself, I'd suggest that you disconnect the battery and wait the same amount of time beforing starting it up again. If it starts up, then I'd suspect that something is drawing too much current (parasitic load) with the car off.

If the battery is still bad after this time (after being disconnected for the two weeks or whatever), then I'd suspect either the battery was not fully charged to begin.
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