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Trevslac98
Joined: 07 Sep 2006
Posts: 11
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 Posted: Tue Feb 03, 2009 4:14 pm Post subject: Battery draw |
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| My Bimmer is currently in storage because I live in Michigan, but before I put it away for the winter I noticed that the battery wasn't holding juice. I have an optima yellow top thats about two years old. The alternator is pumping out a little under 14V when the car is running. And the battery holds a charge outside of the car. I have subwoofers in the trunk, that I thought was causing the draw. But I unplugged the fuse in the amp. and it still draws. When I first noticed the problem, the car was sitting for about 8 days and no start. Any ideas? could the amp still be drawing if i had a bad ground? Thankx guys |
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yelcab1
Joined: 20 Jan 2001
Posts: 643
Location: san carlos, ca
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| Posted: Tue Feb 03, 2009 6:54 pm Post subject: |
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| modern BMWs are power hogs. Sitting 2 weeks will drain a brand new battery. One week will drain a weaker used battery. You want to install a ground connector and disconnect it before storing. |
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edjack
Joined: 04 Feb 2002
Posts: 3887
Location: San Jose, CA
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| Posted: Tue Feb 03, 2009 8:00 pm Post subject: |
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Better to get a smart battery charger that will float the battery, and keep it fresh during storage.
If you don't want the charger to run all the time, put it on a timer to run for a couple of hours every day.
_________________
Ed BMW CCA member since 1987 (Nr. 62319).
'97 540i 6 speed Aspensilber over Aubergine interior. |
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Trevslac98
Joined: 07 Sep 2006
Posts: 11
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| Posted: Tue Feb 03, 2009 10:14 pm Post subject: |
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Yeah I took the battery out of the car so its in a warm place. I guess to fix my problem I will run my car at least once a week or just put a charger on it when its going to sit. Thanks for the tips
_________________
19" Hartge Classics wrapped in Toyo Proxes. Clear Euros all the way around, UUC Evo III short shift kit with E.R.K. and D.S.S.R. Only Mobil 1 every 2,000 miles. I baby my baby |
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yelcab1
Joined: 20 Jan 2001
Posts: 643
Location: san carlos, ca
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| Posted: Wed Feb 04, 2009 11:34 am Post subject: |
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| Trevslac98 wrote: | | ... guess to fix my problem I will run my car at least once a week ... |
This is really not the best thing for your car. Run it and drive it, or leave it alone. Squirt oil into the cylinders, put stabilizer in the gas tank, put it up on jacks, disconnect the battery, open the window a crack, make sure mice don't nest there, and leave it alone. |
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