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Unread 04-27-2012, 09:59 PM   #1
rkperry1
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2001 WJ 
 
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Jeep wont idle after battery went dead.

Was putting on my long arms today and left my doors open and my battery died. went to go jump the car and it didnt want to start and stay started. finally got it stated by having the pedal down. after it would contatnly stall. would have to feather the pedal to keep it alive. got to to stay around 450 rpm idle in park which is really low??? what would cause this after a dead battery?

Something in engine bay is ticking or hissing possiblly? IAC??

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Unread 04-27-2012, 10:09 PM   #2
WJlover
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my first guess, throttle position sensor?
my zj had a tick and a similar issue, TPS was my issue.

or maybe timing. a 240sx i had did this. started and ran fine (although like ****, but it started) and then one day the battery died, and it wouldnt start anymore. turned out my timing was off an *** ton. along with other issues but thats another story.
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Unread 04-27-2012, 10:12 PM   #3
HVACNY
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Quote:
Originally Posted by rkperry1
Was putting on my long arms today and left my doors open and my battery died. went to go jump the car and it didnt want to start and stay started. finally got it stated by having the pedal down. after it would contatnly stall. would have to feather the pedal to keep it alive. got to to stay around 450 rpm idle in park which is really low??? what would cause this after a dead battery?

Something in engine bay is ticking or hissing possiblly? IAC??
There is a vacuum line under the battery tray that breaks easily,has caused alot of problems for alot of people.Not sure if thats your problem,but its worth a look to see if you broke it.
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Unread 04-27-2012, 11:31 PM   #4
StrokedWJ
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If the battery was dead, it will take some time to fully recharge it. You need to drive it for a while to let the alternator charge the battery back up. Probably a good idea to get your battery tested if its more than a few years old. The WJ's can start acting real funky when the battery gets low on juice.
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Unread 04-27-2012, 11:37 PM   #5
the88thpianoman
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This IS your problem/solution:

When the battery died, your computer reset. When you jumped it, it wouldn't start right away, so you pressed the gas pedal to coax it to start. In doing so, the computer learned the incorrect throttle position for idle. To fix this, disconnect the battery for at least a half hour to reset the computer again. When you start the Jeep back up, turn it to the on position, but not start, to prime the fuel system. After sitting in the on position for three seconds, turn the key over to start and it will fire right up, and DO NOT touch the gas pedal. Let it idle for a few seconds before doing anything, and the computer will learn the correct idle parameters.
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Unread 04-28-2012, 01:34 AM   #6
deanlad1980
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Save your time I promise you that you need a new battery that is all
Had this on 3 jeeps so talking from experience, your battery shouldn't really die from leaving door open unless is ****ed in the first place.
I'm not trying to be a know all but don't waste your time doing anything else just change the battery.
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Unread 04-28-2012, 02:02 AM   #7
pinky2252s
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Quote:
Originally Posted by the88thpianoman
This IS your problem/solution:

When the battery died, your computer reset. When you jumped it, it wouldn't start right away, so you pressed the gas pedal to coax it to start. In doing so, the computer learned the incorrect throttle position for idle. To fix this, disconnect the battery for at least a half hour to reset the computer again. When you start the Jeep back up, turn it to the on position, but not start, to prime the fuel system. After sitting in the on position for three seconds, turn the key over to start and it will fire right up, and DO NOT touch the gas pedal. Let it idle for a few seconds before doing anything, and the computer will learn the correct idle parameters.
I would at least try this first^ since its free.
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Unread 04-28-2012, 06:23 AM   #8
rkperry1
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Quote:
Originally Posted by deanlad1980 View Post
Save your time I promise you that you need a new battery that is all
Had this on 3 jeeps so talking from experience, your battery shouldn't really die from leaving door open unless is ****ed in the first place.
I'm not trying to be a know all but don't waste your time doing anything else just change the battery.
the car doors and music was going from 7 30 am till 11 at night
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Unread 04-28-2012, 06:23 AM   #9
rkperry1
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Quote:
Originally Posted by the88thpianoman View Post
This IS your problem/solution:

When the battery died, your computer reset. When you jumped it, it wouldn't start right away, so you pressed the gas pedal to coax it to start. In doing so, the computer learned the incorrect throttle position for idle. To fix this, disconnect the battery for at least a half hour to reset the computer again. When you start the Jeep back up, turn it to the on position, but not start, to prime the fuel system. After sitting in the on position for three seconds, turn the key over to start and it will fire right up, and DO NOT touch the gas pedal. Let it idle for a few seconds before doing anything, and the computer will learn the correct idle parameters.
gonna try this first
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Unread 04-28-2012, 06:49 AM   #10
rkperry1
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started it up this morning at it was at 900 for a cold start.. problem fixed for now and i didnt do anything
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Unread 04-28-2012, 09:02 AM   #11
HVACNY
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Quote:
Originally Posted by rkperry1

the car doors and music was going from 7 30 am till 11 at night
Not for nothing but why didnt you say that in the first place,you made it seem that you just left your door open for a few,then went to jump it.Had you said that that you drained the s**t out of it,then people would have said just jump it or get a new battery,instead of insuating that there was something deeper to the issue.Whats the problem.
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Unread 04-28-2012, 12:27 PM   #12
gtg413i
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X2 that the system needs to relearn. I had exact same problem after drained battery. Mine never would run for 3 seconds before shutting off, so you may need to drive with two feet for about 15 minutes. As you brake and the jeep starts to stall, give it some gas. Keep the other foot on the brake. Do this for about 10 minutes, then get it up to highway speeds, then you should be fine after that. Be careful driving with two feet at first.
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Unread 04-28-2012, 03:58 PM   #13
snobrdrkid07
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Personal Experiences:
1. When I leave my doors open, after 10-15 min the interior lights will go off by themselves (with the doors still open) Maybe you were opening and closing. The Music will kill it though!

2. With a dead battery the WJ does not like to work, at all. When mine was dead, I ended up being a new battery and it took the computer a few seconds to "re-learn" the idle settings. It bogged then came back up and the leveled out.

3. When I had initially tried to recharge my "dead" battery. I also hit the gas to keep it from dying, around 1500 rpms. While I had just started it. Then when I let off, it went back down to the correct idle. I personally did not have an issue with improper idle when I just reset the battery, and cranked it for the first time.
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Unread 04-30-2012, 08:00 AM   #14
jerrybud
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I'm having the same issue with my 2001 GC -- won't idle for anything! Tried disconnecting the battery and resetting the computer, and it idled fine in the driveway for 30 minutes or so. When I restarted it later it was back to idling at 450 or so, then it would just stall out. It drives fine down the road, but when I come to a stop I have to "drive with two feet". Replaced the TPS about a month ago (due to another issue), and I've never had issues with the battery, but it is almost 5 years old... should I replace it, or is it something else?
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Unread 04-30-2012, 11:35 AM   #15
the88thpianoman
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Quote:
Originally Posted by jerrybud View Post
I'm having the same issue with my 2001 GC -- won't idle for anything! Tried disconnecting the battery and resetting the computer, and it idled fine in the driveway for 30 minutes or so. When I restarted it later it was back to idling at 450 or so, then it would just stall out. It drives fine down the road, but when I come to a stop I have to "drive with two feet". Replaced the TPS about a month ago (due to another issue), and I've never had issues with the battery, but it is almost 5 years old... should I replace it, or is it something else?
Have the battery checked; it could likely be your problem. If your TPS wasn't from the dealership, that could also be a problem. Your throttle body probably also needs cleaning and you may need a new idle air control motor.
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