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Dead battery

Tiny
DISCOTONY
  • MEMBER
  • 2003 CADILLAC CTS
  • 3.2L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 100,000 MILES
Hi,
I have an eight month old battery it was fully charged and within a few days to a week it was dead! I installed wires from the battery to a connector that I plug in daily in my smart charger! I drive this car once or twice a week and do about thirty
Miles, I do not think it is the battery because the one before was about a year old. I have checked to see if there was any lights on, but that is not the case. Can you please help me?

Thanks,

Tony
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Sunday, November 13th, 2016 AT 12:58 PM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It is either to small or you may have a draw on it. Check to see if the volts are at least 12.4 with a digital voltmeter. If they are then have it tested for condition including load test. You should not need a charger on this. It may have a draw or the battery is bad, they can go bad after ninety days especially if it is a Die Hard battery.
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Sunday, November 13th, 2016 AT 2:26 PM
Tiny
DISCOTONY
  • MEMBER
  • 4 POSTS
It is a Walmart battery.
A voltage draw? Like a short or something?
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Sunday, November 13th, 2016 AT 2:33 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It is called a parasitic draw like maybe a light is staying on when you leave the car. on older cars it was always a trunk, hood or glove box light. see link it will tell you how to check it. it will have a small draw however due to electronics.

https://www.2carpros.com/articles/car-battery-dead-overnight
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Sunday, November 13th, 2016 AT 3:36 PM
Tiny
DISCOTONY
  • MEMBER
  • 4 POSTS
I also have another problem. As I start the car it runs well, but when the engine is warm and I am at a light or at a stop it idles rough.
The owners manuel says to use premium or 94 octane, I have used the diver or 92 octane, do you think it is enough to create that problem or what else can it be?
Thanks
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Sunday, November 13th, 2016 AT 4:15 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try cleaning throttle plate on both sides and IAC hole with choke cleaner.
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Sunday, November 13th, 2016 AT 5:00 PM
Tiny
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  • MEMBER
  • 4 POSTS
I have cleaned the throttle body and with an old toothbrush there was a lot of dirt inside. Should I take the throttle body apart? What else can it be?
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Sunday, November 13th, 2016 AT 5:46 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
No need to remove it spray choke cleaner on both sides and wipe it off then it should be okay. Make sure to hit both sides where throttle shaft comes out if that does not take care of it check fuel pressure with a gauge auto parts rent it. See link.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Monday, November 14th, 2016 AT 7:03 AM

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