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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

WTF is wrong with my lt1?

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Old Apr 8, 2011 | 07:09 AM
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c_p_m03's Avatar
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Angry WTF is wrong with my lt1?
ok. so i know i am going to sound like an idiot, but idc. i just bought a new battery last summer for my trans am. well the past 3 days, the battery dies over night. i dont leave any lights on in my car, it just runs out of juice over night. do you think my battery is junk already? or is there a problem with my car?????
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Old Apr 8, 2011 | 07:11 AM
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what kind of battery did you get?
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Old Apr 8, 2011 | 07:12 AM
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Originally Posted by c_p_m03
ok. so i know i am going to sound like an idiot, but idc. i just bought a new battery last summer for my trans am. well the past 3 days, the battery dies over night. i dont leave any lights on in my car, it just runs out of juice over night. do you think my battery is junk already? or is there a problem with my car?????
Any aftermarket accessories you're leaving on causing a draw? Obviously you've got something left on or something is drawing with the ignition off. If you're handy with a multimeter you should be able to find it by pulling fuses.
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Old Apr 8, 2011 | 07:20 AM
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the battery is from napa auto parts. it was the cheapest side post.
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Old Apr 8, 2011 | 08:05 AM
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To test for a parasidic (spelling???) loss, with the key OFF remove one fuse and then measure the amperage across the terminals - it should be less than 40 mAmps (0.040 Amps) - repeat with every / all fuses. Once you find the fuse that is "leaking" you'll know which system is at issue.
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Old Apr 8, 2011 | 09:25 AM
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If nothing else run it down to the parts store and have them test the battery and the alternator, I've had batteries do the same thing your describing.
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Old Apr 8, 2011 | 04:30 PM
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i just had that issue. my alt was good and even my battery was testing good. but...it was the battery
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Old Apr 8, 2011 | 05:13 PM
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Did you plug that wire into the alternator? I forgot to do that and it took me 2 batteries to figure that one out ><
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Old Apr 8, 2011 | 06:41 PM
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you could have a bad diode in your alternator letting the battery drain thru it.
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Old Apr 8, 2011 | 10:20 PM
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Originally Posted by great421
To test for a parasidic (spelling???) loss, with the key OFF remove one fuse and then measure the amperage across the terminals - it should be less than 40 mAmps (0.040 Amps) - repeat with every / all fuses. Once you find the fuse that is "leaking" you'll know which system is at issue.
You can't measure an amperage draw across the terminals. The meter has to be connected in series with one of the battery cables. That means taking a cable off and putting one meter lead on the battery post and the other lead on the cable end.
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