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Unread 07-14-2009, 08:56 AM   #1
ebne0018
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1996 XJ Cherokee 
 
Join Date: Jul 2009
Location: Minnesota
Posts: 3
Grand Cherokee won't idle after dead battery

HELP!

My father-in-law's 96 Grand Cherokee is taking up valuable space in my driveway because it won't idle after the battery died. We used it to move some building supplies and the lights got left on.

After jumping the Jeep, it will no longer idle. It seems to run fine if I keep my foot on the throttle and I am pretty sure the alternator is working and the battery is accepting charge because now it will start without any help from a jump.

Did the jump maybe blow a fuse? Could it be a bad battery?

Help!

Thanks

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Unread 07-14-2009, 09:15 AM   #2
cpudoc6
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1996 XJ Cherokee 
 
Join Date: Feb 2009
Location: Voorhees, NJ
Posts: 43
IAC, There are many write ups on cleaning this. What happes is the Idle Air Controll motor runs all the way in to get referance then it sticks. Once it sticks you need to pull it out and clean it. It is about a 10 - 15 minute job.

Good Luck
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Unread 07-14-2009, 10:04 AM   #3
kc8ztw
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1993 ZJ 
 
Join Date: Dec 2008
Location: Rockford, Mi
Posts: 193
its a jeep/dodge thing. the computer has to relean the adjustments for the IAC dont bother cleaning it yet. just drive it for 8-10 warm up cycles and it will be fine. help it idle- left foot brake hold your foot on throttle a lil, etc. this helps the relearn.
if it dont start working after 50 miles then somthing is wrong
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Unread 07-14-2009, 10:20 AM   #4
ebne0018
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1996 XJ Cherokee 
 
Join Date: Jul 2009
Location: Minnesota
Posts: 3
thanks everyone. I may need to try and fix the IAC first. the jeep has a large trailer attached and I would need to back it out of the driveway with the trailer attached. That would be very difficult with a truck that doesn't idle.
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Unread 07-14-2009, 01:57 PM   #5
crazymjb
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1998 ZJ 
 
Join Date: Apr 2009
Location: somewhere
Posts: 226
I had this problem too. Just get it started and feather the throttle for 5-10 minutes and the ECU will relearn whatever it needs to.

Mike
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Unread 07-15-2009, 08:26 AM   #6
ebne0018
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1996 XJ Cherokee 
 
Join Date: Jul 2009
Location: Minnesota
Posts: 3
Thanks for all the replies everyone. I cleaned the IAC, very poorly, but I cleaned it and the truck started right up!
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Unread 08-11-2009, 05:49 AM   #7
ray_c_yuen
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Join Date: Aug 2009
Location: Sydney
Posts: 1
My nissan pulsar (1990 model n13) was doing exactly the same thing after totally draining the battery. After recharging the battery the car started fine and could be driven but stalled as soon as the revs dropped. I was going to buy a new battery then the automotive electrician said "it sounds like your throttle body. Bring it down and I'll clean it out" (at a cost of course). I've never heard of a throttle body before and was willing to pay to have it repaired. Then my mate suggested 'Try Throttle Body Cleaner' a relatively cheap aerosol spray that works like carby cleaner or fuel injector cleaner (a solvent). It was a simple matter of removing the big rubber hose between the air cleaner and the 'throttle body'. Immediately after spraying the cleaner into the throttle body (it lays horizontal) all this black liquid started flowing out (I'm assuming carbon build up). I started the car and it was idling!!, I sprayed some more cleaner inside while twisting the throttle and I've save some hard earned money. A simple solution that I have not seen after searching many forums.
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