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07-03-2006, 07:55 PM
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#1
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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Does this sound like a dead battery?
You've prolly seen the end of my project thread, but here's the basic problem as I've become able to see it. Anyway, started up it was obviously almost dead, got going and the light faded on, gained up some rpms, faded off, and so on and so forth, but every time I went low on rpms it would come on just a little bit, I guess because it wasn't charging so well. So dead battery, yeah? I need to go find a battery for my DMM now, but what should I be looking for in terms of readings?
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07-03-2006, 08:11 PM
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#2
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Member
Join Date: Feb 2006
Posts: 366
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With the car running, assuming your alternator is good, you should see around 13.8-15.5 volts. Assuming your battery is good, it should have about 12.5 volts with no load, and shouldn't drop below about 9 volts when cranking.
__________________
Anger is a gift!- Zack de la Rocha
Last edited by Bunger : 07-03-2006 at 08:14 PM.
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07-03-2006, 08:12 PM
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#3
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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So check it, start the car, and then check againand it should be 12 and then13-14.7ish?
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07-03-2006, 08:19 PM
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#4
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Member
Join Date: Feb 2006
Posts: 366
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Quote:
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Originally Posted by SVOboy
So check it, start the car, and then check againand it should be 12 and then13-14.7ish?
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Check the battery voltage with no load, make sure its about 12.5V
Start the car, and while its cranking, make sure it doesn't drop below 9.6V
With the car running, bring the RPMs up to 2K and check the voltage, it should be between 13.8 - 15.5V
Also, try turning on your headlights, heater fan (on high) and anything else you can think of, with the car running, it shouldn't drop below 13.3V
Report back. =)
__________________
Anger is a gift!- Zack de la Rocha
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07-03-2006, 08:21 PM
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#5
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Member
Join Date: Feb 2006
Posts: 366
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Also, if you haven't done this already, make sure the fluid in your battery is topped off (unless you have a sealed unit) (only add distilled or highly filtered water)
__________________
Anger is a gift!- Zack de la Rocha
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07-03-2006, 08:35 PM
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#6
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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PS: will an obd1 alternator fit my block?
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07-03-2006, 08:42 PM
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#7
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Driving on E
Join Date: Sep 2005
Location: Salt Lake City, UT
Posts: 3,993
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Quote:
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Originally Posted by SVOboy
PS: will an obd1 alternator fit my block?
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It should. I have a obd0 alternator on my obd1 block. |
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07-03-2006, 08:42 PM
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#8
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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I guess the problem will get fixed somehow.
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07-03-2006, 08:45 PM
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#9
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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Oh yeah, how should I check the fluid level in the battery?
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07-04-2006, 12:16 AM
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#10
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I am a banana
Join Date: Mar 2006
Location: Western Wisconsin
Posts: 1,481
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fluid leavle is checked by poping the caps off the battery, their should be some sort of little leavle notchs down in there thatyou fill till they are covered, if you don't see them then just fill it till the battery has 1/2 of water/acid past the top of the plates, your repair book tells you how to do this as well.
at idle your battery should be charging, 13.5 volts is pretty standard I think.
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07-04-2006, 06:50 PM
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#11
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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Voltages:
Car off: 12.2 V
Cranking: 5 V (wouldn't start, had to bump it)
Just started up no accessories on: 13.6 V
Took it for a drive and came back, at idle with stereo blasting, air on, and lights on: 10 V
Same but no accessories on: 12.6 V
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07-04-2006, 07:03 PM
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#12
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Member
Join Date: Feb 2006
Posts: 366
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Quote:
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Originally Posted by SVOboy
Cranking: 5 V (wouldn't start, had to bump it)
Took it for a drive and came back, at idle with stereo blasting, air on, and lights on: 10 V
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Those 2 bits, don't look good. How old is the battery?
__________________
Anger is a gift!- Zack de la Rocha
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07-04-2006, 07:15 PM
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#13
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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Not sure, came with the previous owner. It's the battery, innit? Not terrible, I'll just go get a lightweight lawnmower battery like jared has,  |
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07-04-2006, 07:49 PM
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#14
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Junior Member
Join Date: May 2006
Location: Overland Park in the Great State of KANSAS
Posts: 88
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Most auto parts stores will check your alternator and battery for free. It could be both are bad. Also, either one can take out the other. I would charge the battery up over night so that it has a good charge and take it to some place that can check it for you. The battery needs to have a full charge to test it correctly.
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07-04-2006, 08:01 PM
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#15
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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Hmm, I need a battery charger,
Anyway, we'll see. |
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07-05-2006, 08:16 AM
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#16
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Senior Member
Join Date: Jan 2006
Location: Newport RI USA
Posts: 2,434
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It is either not any good or not charging - if you rev the engine with all the accessories on and the voltage drops to 10 volts then your alternator is shot or not putting out enough. Higher voltage should be on the battery terminals when the engine is running. Pull the caps off and check for bubbling and don't get the sulfuric acid spray from the bubbles popping in your eyes or on your cloths. If you find one or two cells showing dry plates then you should be getting a new battery. The dry cells were the probably the good ones and got over charged and the ones that are full may be shorted. Take the old one with you when you go for the new one to save a core charge and another trip to the store. Running the car on the battery with the engine off trying to save gas killed the last bunch of charge discharge cycle of it.
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07-29-2006, 05:49 PM
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#17
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*shrug*
Join Date: Sep 2005
Posts: 7,406
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Twas the alternator dying, battery is fine, life is reasonable.
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Linear Mode
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