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Old 03-29-2013, 10:45 PM   #1
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Girlfriends jeep problem

Her jeep wouldn't start because the battery was dead. So I jumped her and after about ten mins of driving it wouldn't idle at stops. The rpms would jump from about 600 to almost stalling. She had to constantly give it gas. Can a dead battery cause that even after the engine is started?

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Old 03-29-2013, 10:47 PM   #2
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Also, the rpm issues didn't start until her battery died.

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Old 03-29-2013, 10:57 PM   #3
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That's what mind used to do when I had a bad battery. Replaced it and it hasn't happened since. And that was about a year ago.
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Old 03-29-2013, 10:58 PM   #4
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Sounds like the alternator isn't charging correctly.
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Old 03-29-2013, 11:06 PM   #5
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Sounds like the alternator isn't charging correctly.
X2. And if your battery is that dead you don't want the alternator to recharge it, that puts a lot of stress on the alternator. Put a battery charger on it... If it's that dead I'd just replace it.
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Old 03-29-2013, 11:06 PM   #6
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The jeeps brain(ecu) likes to forget how to idle if u let the battery awhile just drive it for half hour or so should be fine!
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Old 03-29-2013, 11:07 PM   #7
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Take the battery to a Walmart or parts store and they should test it for free.
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Old 03-29-2013, 11:07 PM   #8
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Mine has done it to me twice I like to leave the lights on !
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Old 03-29-2013, 11:18 PM   #9
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The jeeps brain(ecu) likes to forget how to idle if u let the battery awhile just drive it for half hour or so should be fine!
The ecu & fuel pump get their power from the battery. So if the alternator isn't charging the battery everything goes haywire. If the battery was charged & then the alternator went out while driving the battery will power the computer & fuel pump for 20 or 30 minutes of driving before it starts trying to die & finally stalls & won't restart.
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Old 03-29-2013, 11:26 PM   #10
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How do I fix the stalling problem? Just drive it for awhile?
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Old 03-29-2013, 11:29 PM   #11
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Put a volt meter on the battery while its running & see if the alternator is charging the battery.
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Old 03-29-2013, 11:34 PM   #12
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It needs a battery. If the alternator wasn't charging, it wouldn't run at all. They won't idle if the battery can't supply a minimum voltage. I see it all the time with Chrysler products.
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Old 03-29-2013, 11:39 PM   #13
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How do I fix the stalling problem? Just drive it for awhile?
Any mechanic will tell you to start with the easiest of trouble shooting and like I said this has happened to me twice just drive it around and it went away the 2nd time I just kept the Rpms up for 15 or so mins and went away scared the crap outa me the first time thought I efed everything up but a little research n came up with the same info I gave u
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Old 03-29-2013, 11:40 PM   #14
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The ecu & fuel pump get their power from the battery. So if the alternator isn't charging the battery everything goes haywire. If the battery was charged & then the alternator went out while driving the battery will power the computer & fuel pump for 20 or 30 minutes of driving before it starts trying to die & finally stalls & won't restart.
He said the battery was dead didn't die while driving and if the ecu looses power then it will reset and cause issues
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Old 03-29-2013, 11:42 PM   #15
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Old 03-29-2013, 11:45 PM   #16
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They give a few things that can be the issue wich two are inclouded then there the tps but like I said start with the easiest and work ur way up
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Old 03-29-2013, 11:45 PM   #17
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OK, find out why the battery died. If there was nothing left on, and no drain on the battery, try putting it on a charger over night. Take it somewhere where they can load test the battery and the alternator.

Then replace the battery.

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