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Old 12-05-2012, 08:01 AM   #1
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DO I just need a new battery?

This morning while trying to start my jeep, the dash came on for a second, then died. When I turned the key more, nothing happened. When I found someone to jump me, I would crank the jeep, and it would turn over and run but then die almost immediately. To get it to finally stay running, I would have to press and hold the gas for a little while. Then, when I parked at work and tried to start it again, absolutely nothing happens. I'm going to need to jump it again.

Do I just need a new battery or what?

(I do have an amp hook straight to the battery, but I've had that for months now.)

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Old 12-05-2012, 08:11 AM   #2
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I would start with the free & simple things first... try cleaning the connections.

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Old 12-05-2012, 08:21 AM   #3
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I would start with the free & simple things first... try cleaning the connections.
x2. You can also take your battery to an autozone or the like and they'll test it for free.

I'm having the engine starts but you need to rev it to keep it going issue as well... Been reading numerous threads and have yet to pin down the issue.
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Old 12-05-2012, 08:24 AM   #4
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The battery was drained enough that you are only getting enough juice for the starter. That is why it won't run. Electronic fuel injection with an electric fuel pump and the ECU overwhelm what little is left of the battery. Depending on the type of battery you may have other options. However, if you don't want to mess with it and/or you feel like upgrading your battery, a new one will solve the issue too.
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Old 12-05-2012, 08:29 AM   #5
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Yep check the connections on the battery and if still no start or dash instruments jump it and take it to a AutoZone they will test it for free... And the altinator if you need a new battery to make sure that the altinator isn't the sourse of the problem. I am a manager at AutoZone.
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Old 12-05-2012, 08:39 AM   #6
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Before you take it to auto zone. Charge it fully. Then while someone else cranks it put volt meter on the battery. If voltage drops near 10 volts the battery is bad. This is testing the battery under a load.
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Old 12-05-2012, 08:41 AM   #7
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Before you take it to auto zone. Charge it fully. Then while someone else cranks it put volt meter on the battery. If voltage drops near 10 volts the battery is bad. This is testing the battery under a load.
Thats a good idea to, but the little tester we use at AutoZone does the same load test and you won't have to take the time to charge the battery.
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Old 12-05-2012, 08:46 AM   #8
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How do you test your alternator?
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Old 12-05-2012, 08:49 AM   #9
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How do you test your alternator?

Put a voltmeter on the leads while the vehicle is running.
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Old 12-05-2012, 08:54 AM   #10
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I'd bet the issue is simply that the batteries in question aren't getting a deep full charge and they are potentially old and tired.
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Old 12-05-2012, 08:54 AM   #11
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Put a voltmeter on the leads while the vehicle is running.


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I'd bet the issue is simply that the batteries in question aren't getting a deep full charge and they are potentially old and tired.
Kind of what I figured, the PO of my jeep threw an el cheapo battery in there. I think I'm going to upgrade to a Sears platinum with some extra terminals for my not yet purchased winch.... Heard too many negative things about the Optimas recently.
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Old 12-05-2012, 08:56 AM   #12
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Just so there's no confusion: You can test it at the battery leads, you don't have to get to the alternator posts.

Should hit 13.8-14.8 volts with the vehicle running.
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Old 12-05-2012, 08:57 AM   #13
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My money is on a bad battery too.
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Old 12-05-2012, 08:59 AM   #14
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Heard too many negative things about the Optimas recently.
You heard right in my personal opinion. It's real hard to beat the Sears Diehard Platinum P4 battery for our Jeeps, I'm on my second of them in two TJs and it's a superb battery.
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Old 12-05-2012, 09:02 AM   #15
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You heard right in my personal opinion. It's real hard to beat the Sears Diehard Platinum P4 battery for our Jeeps, I'm on my second of them in two TJs and it's a superb battery.
Funny you should chime in Jerry. I saw you touch on this very issue in a previous post and you convinced me there. Love the signature BTW.

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Old 12-05-2012, 09:14 AM   #16
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IS advanced Generations a good battery?
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Old 12-05-2012, 11:41 AM   #17
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Sears. Doesn't get any better. Well yellow tops aren't bad....
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Old 12-05-2012, 11:44 AM   #18
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I have a Yellow top and a Diehard in my Jeeps. The Yellowtop is going on 3 years now and the Diehard is a couple months old. I guess I got lucky with my Optima, They both start the same

IMO you can't go wrong with the diehard. Even though my experience with Optima has been fine, seems like everyone elses hasn't.
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Old 12-05-2012, 12:03 PM   #19
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Optima's quality and reputation used to be superb. Then several years ago, they were purchased by Johnson Controls Inc. who moved their entire manufacturing operation to Mexico where the lead purity was also reduced. That's when their quality took a nose-dive. Of course all of that is in strictly my personal opinion.
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Old 12-05-2012, 01:35 PM   #20
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I ended up replacing the negative terminal and that fixed the issue. The one I had one there was old and warped. Probably could have just cleaned it but the new one looks a lot nicer. Thanks for all the replies!

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