Does your battery go flat after 4 weeks of not driving?
#1
Does your battery go flat after 4 weeks of not driving?
My battery in my car keeps going flat after say 3-4 weeks of the car sitting.
I checked the drain on the battery and it is only 2mA which is not enough to drain a battery in 4 weeks.
I have spoken to 4 other people who have camaro's and they have the same problem. Sounds like something common.
Someone said about the alternator overchraging the battery which shortens the life of it and also means it loses its charge over a short time.
Anyone have similar problem? Any possible fix?
I don't know about the alternator overcharging as I have a digital volt meter gauge hooked up and it shows me around 13.5 volts when I am driving around. That seems to be what it should be like.
Any ideas?
I checked the drain on the battery and it is only 2mA which is not enough to drain a battery in 4 weeks.
I have spoken to 4 other people who have camaro's and they have the same problem. Sounds like something common.
Someone said about the alternator overchraging the battery which shortens the life of it and also means it loses its charge over a short time.
Anyone have similar problem? Any possible fix?
I don't know about the alternator overcharging as I have a digital volt meter gauge hooked up and it shows me around 13.5 volts when I am driving around. That seems to be what it should be like.
Any ideas?
#2
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Car: 92 B4C/1LE CHP camaro 06 vette LS2,
Transmission: iroc, 700r4, auto
i have the same problems with mine. also had the problem with my 87 GTA, 89 iroc, 91 formula. i guess they all go dead after a couple weeks.
#4
BUt this is the only car that ever goes flat on me. I don't even have to drive my other car for 6 months and it fires right up.
The question is why does it go flat?
The problem with u nhooking the ground cable is that you go into learn mode every time you take the car out for a drive.
The question is why does it go flat?
The problem with u nhooking the ground cable is that you go into learn mode every time you take the car out for a drive.
#6
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Car: 89 IROC-Z
Engine: 355 TPI
Transmission: 700R4
My 89 will go three months and turn righ over. Whats the voltage on the battery (not in the dash) with the car running. Take the battery out and have it tested, and right.
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#8
I have had 2 batteries swapped over so I doubt both of them are faulty.
The voltage when running is over 13volts.
After 3-4 weeks of standing the battery voltage with key ON is 11.4 volts, and it will not start the car.
I have spoken 4 other owners and they have the same problem. Maybe you gusy drive your car too often to notice it?
The voltage when running is over 13volts.
After 3-4 weeks of standing the battery voltage with key ON is 11.4 volts, and it will not start the car.
I have spoken 4 other owners and they have the same problem. Maybe you gusy drive your car too often to notice it?
#9
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Car: 89 IROC-Z
Engine: 355 TPI
Transmission: 700R4
2mA should be fine for well over a month. I don't start my 89 but once a month at the most, at least for the last year. Maybe the starter motor is pulling to much current? I think the best thing in your case may be a battery tender/trickle charger and leave that on the car and call it good.
#10
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Car: 1988 IROC 5.7 Money Pit
Engine: (being built; modified TPI ZZ4
Transmission: 2200 stall/ stage 3 700R4
Axle/Gears: freshened 3.27 in 9.bolt/
Battery volts chart...
The best test IS to disconect your ground and see if your battery drains in the same amount of time. Sometimes you can have a battery that 'shows' it is fully charged, but you'll have a bad cell that will show up if you have a 'load test' performed.
Here is a general chart that shows volt readings from a 12v battery:
100% 12.70 volts
90% 12.50
80% 12.42
70% 12.32
60% 12.20
50% 12.06
40% 11.90
30% 11.75
20% 11.58
10% 11.31
0% 10.50
I use a small hand sized european battery voltage maintainer/tender for my RV, as those batteries tend to sit for several weeks at a time. It is tough on a battery to let it run out and then to charge it all the way back up.
Hope the info is a help. Nitro
Here is a general chart that shows volt readings from a 12v battery:
100% 12.70 volts
90% 12.50
80% 12.42
70% 12.32
60% 12.20
50% 12.06
40% 11.90
30% 11.75
20% 11.58
10% 11.31
0% 10.50
I use a small hand sized european battery voltage maintainer/tender for my RV, as those batteries tend to sit for several weeks at a time. It is tough on a battery to let it run out and then to charge it all the way back up.
Hope the info is a help. Nitro
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Car: 91 Camaro RS
Engine: Holley MPFI, AFR 195, Hot Cam=375HP
Transmission: T-56
On a side note guys. If you buy an LT1 starter they require a lot less cranking amps. Doesn't solve your draining problem, I know.
But at least you can start your car. They weigh 9 pounds less and they are smaller.
Is there a lot of humidity where you are. Sometimes power drains can be intermittent and often get worse when there is moisture everywhere. It helps if you sneak up to the car to take it's voltage reading also, sometimes they lie if they know your trying to fix them.
Ben
But at least you can start your car. They weigh 9 pounds less and they are smaller.
Is there a lot of humidity where you are. Sometimes power drains can be intermittent and often get worse when there is moisture everywhere. It helps if you sneak up to the car to take it's voltage reading also, sometimes they lie if they know your trying to fix them.
Ben
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Car: Red on Red 89 RS
Engine: LO3 305 TBI
Transmission: TH-700R4
Axle/Gears: 10-bolt / 2.73
I have 2 optima red top batteries. my car sat for over 6 months and fired right up no problem.
#14
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Another option on battery drain - fuel pump. On my TBI cars, the fuel pump is wired directly to the battery + terminal via the Oil Pressure Sending Unit (OPSU).
I had the OPSU go bad - allowing the fuel pump to constantly run, even when key was out of car. My battery died every 2-3 days, and it drove me crazy until I found it by shear luck - I walked past the car at 3am one night, when all was deadly quiet in the 'hood, and heard the pump running (it's rarely quiet since I'm close to a major roadway). OPSU was the culprit. Open those hatches and lay that ear on the hump (late at night) when battery mysteriously goes dead.
I had the OPSU go bad - allowing the fuel pump to constantly run, even when key was out of car. My battery died every 2-3 days, and it drove me crazy until I found it by shear luck - I walked past the car at 3am one night, when all was deadly quiet in the 'hood, and heard the pump running (it's rarely quiet since I'm close to a major roadway). OPSU was the culprit. Open those hatches and lay that ear on the hump (late at night) when battery mysteriously goes dead.
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Car: 83 Trans-Am (Recarro)
Engine: 305 4bbl
Transmission: 5 speed manual
You guys got it easy. My battery dies overnight while its disconected and my battery is only 8 months old, that battery I had before did the same thing. When I go home, I have to put in on the charger.
Is there any type of additive to help with the cells?
Is there any type of additive to help with the cells?
#17
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Originally posted by Bens3rdGen
Was that the sending unit right above the oil filter?
Was that the sending unit right above the oil filter?
#18
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Car: 1991 camaro convertible RS
Engine: 305 5.0 liter v8
Transmission: A4
ya ive heard that to, i only drive mine when it is nice or for club meetings/events. but i start it once a week just to keep it running!!!
good luck
good luck
#19
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Car: "02 z-28
Engine: LS-1
Transmission: 4L60E
Re: Does your battery go flat after 4 weeks of not driving?
Originally posted by IroczInOz
My battery in my car keeps going flat after say 3-4 weeks of the car sitting.
I checked the drain on the battery and it is only 2mA which is not enough to drain a battery in 4 weeks.
I have spoken to 4 other people who have camaro's and they have the same problem. Sounds like something common.
Someone said about the alternator overchraging the battery which shortens the life of it and also means it loses its charge over a short time.
Anyone have similar problem? Any possible fix?
I don't know about the alternator overcharging as I have a digital volt meter gauge hooked up and it shows me around 13.5 volts when I am driving around. That seems to be what it should be like.
Any ideas?
My battery in my car keeps going flat after say 3-4 weeks of the car sitting.
I checked the drain on the battery and it is only 2mA which is not enough to drain a battery in 4 weeks.
I have spoken to 4 other people who have camaro's and they have the same problem. Sounds like something common.
Someone said about the alternator overchraging the battery which shortens the life of it and also means it loses its charge over a short time.
Anyone have similar problem? Any possible fix?
I don't know about the alternator overcharging as I have a digital volt meter gauge hooked up and it shows me around 13.5 volts when I am driving around. That seems to be what it should be like.
Any ideas?
Last edited by Danno; 02-20-2006 at 09:57 AM.
#20
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Car: 1988 IROC 5.7 Money Pit
Engine: (being built; modified TPI ZZ4
Transmission: 2200 stall/ stage 3 700R4
Axle/Gears: freshened 3.27 in 9.bolt/
RE: Cigarette Power Port Charger...
Yep, those little plug in items work great! I have a vehicle that stays stored for weeks at a time between use. I was always having to plug in a battery charger to start it every month (it has a lot of electronic sensors that light up when ignition is off, the stereo system sucks up power to maintain the clock and all the preprogramed stuff, etc) I installed a $20 buck unit thats about 6" x 12", and have never had a problem for the past year.
That was an excellent point about ambient temperature. Battery life drops like a rock as it gets cold(er). Had forgotten about it. Nitro
That was an excellent point about ambient temperature. Battery life drops like a rock as it gets cold(er). Had forgotten about it. Nitro
#21
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Car: 83 Trans-Am (Recarro)
Engine: 305 4bbl
Transmission: 5 speed manual
I just went to the J.C. Whitney website. I remember those solar power chargers being around $20. Now there $$$$$!
#22
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Car: '89 GTA
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3.45
I start the GTA up about once a month and run it for about 15 minutes, so far it's been starting up fine and the battery is about....uh 8 or 9 years old, lol. definately time for a new one but I really only need it to start for me one more time since we're moving to a new place with a 3800sq ft pole building that I can tear it completely apart in.
#24
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Car: 89 IROC-Z
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: Borg Warner 3.45
Silly question: do you have an alarm on your car? My alarm is programmed to automatically arm after 20 seconds. I cannot leave it sitting for more than a couple of weeks before the battery goes dead, unless I deactivate the alarm. Then it will sit for months... if I let it...
#25
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Car: 1988 IROC 5.7 Money Pit
Engine: (being built; modified TPI ZZ4
Transmission: 2200 stall/ stage 3 700R4
Axle/Gears: freshened 3.27 in 9.bolt/
RE: Silly question...
That's not a silly question at all. It goes along with all the electronics now that are finding their way into our cars. Many of them need power to keep their 'memory' going, or on quick start activation. I think it's a good reason why many people are swaping out their batteries for those Optima deep cycle type Gel batteries, although you have to be really careful when recharging them; Doing a fast 'charge' will ruin them. They need to be recharged on a battery charger's low setting. Nitro
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