whats wrong with my jeep need answer asap (Jeep won't idle after jump start) - JeepForum.com

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post #1 of 25 Old 11-03-2008, 08:31 AM Thread Starter
Wrangler11
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whats wrong with my jeep need answer asap (Jeep won't idle after jump start)

I tried starting my jeep, I haven't done so in a few months. It won't start lights won't even turn on. I figure the battery is dead. I try jumping it, get it start and it won't idle just dies. What's wrong?


2002 Grand Cherokee Limited
1994 Toyota Land Cruiser (camping offload toy)
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post #2 of 25 Old 11-03-2008, 08:34 AM
ram1500dodge
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bad gas....?

Steve

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Originally Posted by The Mean Fish View Post
......If hooking up some suspected terrorist's nads to a car battery yields a .001 % chance that we get a tiny bit of information that might save 1 American life I couldn't care less, red is positive and black is negative......
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post #3 of 25 Old 11-03-2008, 08:36 AM Thread Starter
Wrangler11
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it ran before on the same tank...

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1994 Toyota Land Cruiser (camping offload toy)
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post #4 of 25 Old 11-03-2008, 08:36 AM Thread Starter
Wrangler11
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could it be the alternator or starter? or does it just maybe need to charge more

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post #5 of 25 Old 11-03-2008, 08:37 AM
DaOne
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I seem to remember someone stating that if the battery is completely dead, the Jeep will not run...hopefully someone with this knowledge will chime in here.

...Sometimes, the more you see, the less you understand...

I miss my Jeep. On the hunt for a replacement.
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post #6 of 25 Old 11-03-2008, 08:37 AM Thread Starter
Wrangler11
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I jumped it though, so the battery needs to charge a little longer?

2002 Grand Cherokee Limited
1994 Toyota Land Cruiser (camping offload toy)
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post #7 of 25 Old 11-03-2008, 08:38 AM
ram1500dodge
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Quote:
Originally Posted by Wrangler11 View Post
it ran before on the same tank...
you said this is the first time youve started it in a couple of months.....im gonna say its fuel related, how long does it stay running once it starts?

Steve

Quote:
Originally Posted by The Mean Fish View Post
......If hooking up some suspected terrorist's nads to a car battery yields a .001 % chance that we get a tiny bit of information that might save 1 American life I couldn't care less, red is positive and black is negative......
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post #8 of 25 Old 11-03-2008, 08:39 AM
ram1500dodge
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Quote:
Originally Posted by Wrangler11 View Post
I jumped it though, so the battery needs to charge a little longer?
once started, the altenator should keep it running

Steve

Quote:
Originally Posted by The Mean Fish View Post
......If hooking up some suspected terrorist's nads to a car battery yields a .001 % chance that we get a tiny bit of information that might save 1 American life I couldn't care less, red is positive and black is negative......
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post #9 of 25 Old 11-03-2008, 08:41 AM Thread Starter
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it dies if I don't give it gas. So it could be the alternator than?

2002 Grand Cherokee Limited
1994 Toyota Land Cruiser (camping offload toy)
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post #10 of 25 Old 11-03-2008, 08:42 AM
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just keep the revs up for a few minutes and it will stay running after that
it will continue to do this for the next few times you start it
but once you are starting it regularly again it will go away
but a vechile siting this long should get new oil and plugs
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post #11 of 25 Old 11-03-2008, 08:43 AM
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fuel related X2

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post #12 of 25 Old 11-03-2008, 08:45 AM Thread Starter
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its running now. Guess it just needed a little more charge.

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post #13 of 25 Old 11-03-2008, 08:48 AM
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The alt. needs some juice to produce a charge, it has to be excited to work(really)

1st Make sure the is water/acid to the proper level in Bat.
2nd Remove and clean all Bat connections.
3rd Charge Bat. overnight if possible.
4th If unable to charge, leave jumpers on for a while, while running both vehicles, giving time to store juice in the discharged Bat.

Check output of Alt. Should be somewhere in the range of 13.5 - 14.2 volts

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post #14 of 25 Old 11-03-2008, 08:50 AM
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Disregard, , looks like you got it working while I was posting.

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post #15 of 25 Old 11-03-2008, 09:06 AM
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Quote:
Originally Posted by ram1500dodge View Post
once started, the altenator should keep it running
Nope, very common misconception. The alternator, as has been stated, needs voltage from the battery to produce current needed to run the rig.

That's another reason why all the manual trans owners are wrong when they state one of the reasons to own a manual is so you can bumpstart if your battery dies. If the battery is dead, you can drag it around the block with another vehicle and it won't run until there's enough juice in the battery to keep it going.

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