very low idle then dies. -
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Unread 05-20-2010, 10:59 PM   #1
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2004 TJ Wrangler 
Join Date: Jul 2008
Location: Scranton PA
Posts: 22
very low idle then dies.

I have a 2004 wrangler unlimited (LJ) with a 4.0 and just today out of the blue.... On the first crack all the gauges on the cluster maxed out then came back with no starter... tried again and got it to crank for 5 seconds with no start. after a few cranks it started. I gassed it. rpm's rose. when i released accelerator it just dropped off again. next start it would idle at around the first dot above zero. and move slightly up and down then die after awhile or if i hit the gas and let it go it seems like the engine just lets it fall and die. beside the idle it seems to run fine i just need to keep the engine running with a little gas applied. this is the only problem i have ever had with my jeep. i did not recently get gas. The only think that worries me is the way the gauges seemed to freak out the first time then the problem started.

Thanks for the help in advance.

failure2stop is offline   Reply With Quote
Unread 05-20-2010, 11:06 PM   #2
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2005 TJ Wrangler 
Join Date: Jul 2007
Location: Galveston, TX
Posts: 711
hmm.. check the battery and make sure your wires from the alternator are secure and nothing is shorting out to the body.
Could be that you're losing power from your alternator somewhere.
Check your battery is 12v. If you have a voltmeter you can check that your alt. is up to spec.
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Unread 05-21-2010, 06:59 AM   #3
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2005 TJ Wrangler 
Join Date: Nov 2005
Location: La Verne, CA
Posts: 8,373
Does it throw any codes? Once you check the battery and connections as recommended above, you may want to clean the throttle body and IAC (I-dle A-ir C-ontroller). The IAC is responsible for maintaining idle.
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Unread 05-21-2010, 09:22 AM   #4
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1997 TJ Wrangler 
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Location: Milford, CT
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I would have to second the alternator. My old car, a Nissan maximal same systoms and it was the alternator
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