ok i don't know if this is the battery but here is the situtation. I jumpstarted the car this morning cause the battery was dead. so it starts I drive it around and parked. then started it like an hour later and the volts had gone down. drive it around and the volts go up a little bit above 13 then i let the car sit for 3 hours and the volts go down to like 9 and the car takes like 5 seconds to turn over. does anyone know why the battery would loose power after sitting a while? also could it be the alternator i don't think it could be since it keeps charging the battery. thanx in advacne.

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86 Z28:
350 vette
aluminum heads
T-5
235/60R15 BFgoodriches
dual 3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt Sony xplod amp
Sony xplod deck
K&N air filter

 

come on guys please!!!!!!!!

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86 Z28:
350 vette
aluminum heads
T-5
235/60R15 BFgoodriches
dual 3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt Sony xplod amp
Sony xplod deck
K&N air filter

 

Could have a dead cell or two in the battery. Go buy another one. If that doesn't do it. It's alternator time.

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1986 SC Camaro
Mods: Threw 2.8 in garbage, put in rebuilt
350 .060 over, XE268H Comp cam, Edlebrock
Performer Intake and Edlebrock 600 CFM Carb,
Pete Jackson noisy GearDrive (which sounded
cool for about 5 minutes, now I'm sick of it)
Rebuilt TH350, 3.42 Rear Gears. LCA RLB's.

 

what would cause a dead cell in a battery? could it be that the battery has been run dead a couple of times and recharged? thanx for any help

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86 Z28:
350 vette
aluminum heads
T-5
235/60R15 BFgoodriches
dual 3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt Sony xplod amp
Sony xplod deck
K&N air filter

 

Dead cell could be just a bad battery or abused(dropped) and lots of other possibilities. Have the battery fully charged and then tested, if it's bad replace it. Then have the alternator tested, if it's bad replace it. If you still have a problem, something may be drawing power from the battery(alternator can do this and still work correctly)

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

id say its bad...it wont hold a charge.

take it to a parts store (that sells batteries) have em test it, and you will most likely need a new one.

 

when i shut it off it has full charge then it drops to like 8 volt. this morning it was at 8 volts and it took a couple of seconds to turn over but it did turn over i guess ill get it checked.
thanx for the help..

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86 Z28:
350 vette
aluminum heads
T-5
235/60R15 BFgoodriches
dual 3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt Sony xplod amp
Sony xplod deck
K&N air filter

 

Just because a battery is "fully charged" does not mean that it is "healthy". From what you have stated, I would agree with every other post advising you to replace it, or at least have it tested (often free from parts stores).

I would guess that, while it is "fully charged", the capacity, or ability to provide current (amperes), is extremely low - perhaps enought to just start it once.

If you want to do a simple crude test yourself, with a fully charged battery, turn on all the lights and accessories (with the engine "off") for 15-30 minutes, then start it. If it doesn't even turn over, the battery is probably bad.

 

i will get the battery tested tommorrow and probably get it replaced. ill let u guys know what happens.

------------------
86 Z28:
350 vette
aluminum heads
T-5
235/60R15 BFgoodriches
dual 3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt Sony xplod amp
Sony xplod deck
K&N air filter

 

I changed the battery today and it seems to be starting better already. so i guess it was the battery thanx for the help guys!!!

------------------
86 Z28:
350 vette
aluminum heads
T-5
235/60R15 BFgoodriches
dual 3"flowmaster exhaust
20% tint
hatch wing
2 12"kicker solos
300 watt Sony xplod amp
Sony xplod deck
K&N air filter