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Old 02-09-2014, 09:46 PM   #1
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2003 Wrangler Won't Start...Need Help!

Hello All...I have a 2003 Wrangler Sahara 4.0 Auto Tranny...drove it a few days ago with no issues...came home and parked it in the driveway...went out today to take it for a spin and it won't crank...it will turn over, just won't start...has plenty of fuel in it, however the fuel gauge is showing empty and the low fuel light is on...checked the engine error codes and none are showing...acts like its either getting no fuel or no spark...any suggestions on where to start? Thanks guys!

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Old 02-09-2014, 10:28 PM   #2
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Some one siphon your gas? Just a guess grew up in St. Louis lol.

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Old 02-10-2014, 12:45 AM   #3
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Sound like the sending unit in the tank went out check fuses and/or fuel pressure wich ever you find easier. If fuses are good and no pressure check power and ground at the sending unit.
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Old 02-10-2014, 01:33 PM   #4
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I checked the fuses and relays and they seem fine. I don't hear the fuel pump starting up when I turn on the key...could this be a bad fuel pump or fuel sending unit? I'm a little ignorant on these, but are they the same thing or different parts? I also got a P0523 code to show up, but that indicates something with the oil sending unit...I don't think this would cause the fuel gauge to show empty and the fuel light to be on when there is plenty of fuel in the tank....
Thanks
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Old 02-10-2014, 02:32 PM   #5
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How do you know there is plenty in the tank? I would put a couple gallons in it before I did anything else, sounds like someone got you for your gas bud.
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Old 02-11-2014, 01:29 PM   #6
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Trust me it had plenty of fuel in it....I put an extra 5 gallon tank in it to be sure...
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Old 02-11-2014, 07:59 PM   #7
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Clogged filter or plugged up injectors maybe. Maybe like the other guy said a sending unit . Very easy to trouble shoot. If it were my guess since you came home and just parked it , I would say check the injectors.
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Old 02-13-2014, 12:01 AM   #8
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If it were mine I would check the fuel pressure on the fuel rail I think they rent the pressure testers at major parts stores and check for power and ground at the pump wiring connector. I dont think you have to drop the tank to get to the connector? I can look up the wiring diagram tomorrow at work if you cant find it on line. Do you have a decent multi meter? The sending unit is the fuel level sensor, pump is the pump. The names get mixed up.
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Old 02-14-2014, 10:27 PM   #9
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Quote:
Originally Posted by wjwillia View Post
Hello All...I have a 2003 Wrangler Sahara 4.0 Auto Tranny...drove it a few days ago with no issues...came home and parked it in the driveway...went out today to take it for a spin and it won't crank...it will turn over, just won't start...has plenty of fuel in it, however the fuel gauge is showing empty and the low fuel light is on...checked the engine error codes and none are showing...acts like its either getting no fuel or no spark...any suggestions on where to start? Thanks guys!
I had the same thing me about a couple months ago. Something ate through my wires, (probably a squirrel) at the connector at the tank. Crawl under the back end of the car and check the wires. They are on the top front side of the fuel tank.
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Old 02-14-2014, 10:42 PM   #10
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Thanks all for the replies...I've got a couple things to check and hopefully will figure out what it is...
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Old 02-15-2014, 01:38 PM   #11
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Ok guys....I climbed under the Jeep this morning and started inspecting stuff...I found a 4-wire connector located on the drivers side of the Jeep near the top of the fuel tank...two of the wires (green and blue with stripe on it) were broken completely...a third wire was almost broken...Im guessing this might be the problem...anyone out there had this happen before? If so is there a complete wiring assembly to replace it? Thank!

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