Charging issue
#1
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Car: 1988 camaro
Engine: 350
Transmission: 700r4
Axle/Gears: 3.42
Charging issue
My 1988 Camaro has developed an issue starting. I’ve checked the draw with the car off, .5 Amps, and that the alternator is charging when it does start, but if the battery is “charged” and the car is turned off it will immediately not start without a jump. Once jumped it fires right up until it’s turned off again, I’m all out of things to check. Thanks.
#2
Supreme Member
Re: Charging issue
do you mean cranks but will not start,or will not even crank? .5 amps is quite a bit of idle current draw-that will pull the batt low overnight. Also what induction system,{carb swap,TPI etc.) is in place
#3
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Car: 1988 camaro
Engine: 350
Transmission: 700r4
Axle/Gears: 3.42
Re: Charging issue
No cranking until it gets jumped, I tried charging it outside of the car then put it in at full charge and turn the key provides no noise. It’s carb swapped electronics are pretty much all the stock lights, a hei distributor and radio which I’ve had unplugged since the issue started.
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Charging issue
0.5A quiescent load on the battery is way too much. Need to figure out what's causing that and eliminate.
The battery is dead. The car is actually running on the alternator after the jump start. It might take 8 to 12 hours to recharge a deeply discharged battery. Even more time if your charger can't provide much current.
But it's possible that your battery is so damaged from frequent discharging that it is useless now. Rule of thumb, a flooded lead acid starting battery loses 50% life for each time it is discharged. And it will lose "capacity" as the plates are damaged by the deep discharging and recharging process.
Battery "capacity" is like how big is your bucket of energy stored inside the battery. Battery "state of charge" is like what percent full is that bucket of energy. I think what has happened is your battery capacity has been reduced from a bucket to a thimble. And your battery charger is filling up that thimble and saying it's 100% full now.... It's charged! But a thimble full of energy won't run your starter motor. That's why you can charge your battery, put it in your car, and it won't crank. Generally you can't get capacity back, when it's gone it's gone. (That's not always true but beyond this discussion.)
The battery is dead. The car is actually running on the alternator after the jump start. It might take 8 to 12 hours to recharge a deeply discharged battery. Even more time if your charger can't provide much current.
But it's possible that your battery is so damaged from frequent discharging that it is useless now. Rule of thumb, a flooded lead acid starting battery loses 50% life for each time it is discharged. And it will lose "capacity" as the plates are damaged by the deep discharging and recharging process.
Battery "capacity" is like how big is your bucket of energy stored inside the battery. Battery "state of charge" is like what percent full is that bucket of energy. I think what has happened is your battery capacity has been reduced from a bucket to a thimble. And your battery charger is filling up that thimble and saying it's 100% full now.... It's charged! But a thimble full of energy won't run your starter motor. That's why you can charge your battery, put it in your car, and it won't crank. Generally you can't get capacity back, when it's gone it's gone. (That's not always true but beyond this discussion.)
Last edited by QwkTrip; 12-23-2023 at 03:10 PM.
#5
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Re: Charging issue
I had a similar situation. the draw was .5 amps & was caused by a corrosion issue on the button switch for setting the hour on my radio.
#6
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Car: 1986 IROC Z
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23 Posi
Re: Charging issue
My 1988 Camaro has developed an issue starting. I’ve checked the draw with the car off, .5 Amps, and that the alternator is charging when it does start, but if the battery is “charged” and the car is turned off it will immediately not start without a jump. Once jumped it fires right up until it’s turned off again, I’m all out of things to check. Thanks.
#7
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Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Charging issue
500mA is a big Parasite!!!
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