Jeep Died, no spark, Could be CKP? - JeepForum.com

 
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post #1 of 9 Old 07-04-2010, 08:42 AM Thread Starter
jasonamorris
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Jeep Died, no spark, Could be CKP?

I posted a post before this asking about the location on the CKP but I thought I would post my entire problem and get some ideas... I have been reading post searches all morning and feel like i'm going in circles...

Yesterday I was enjoying the day when at about 55mph the jeep died completely... I pulled over and gave it a few cranks, it would turn over at first but would immediately die, then nothing...

My first thought was the fuel pump. So when i got it home, I tested the following...

Fuel Pump - i could hear it kick on for 3 or so seconds... Good.

I check for spark and nothing. so the next morning I gave it another try and it fired right up. I let it run for about 15mins and it seemed ok...

I read that if the CKP is bad it will not fire when hot but will work again when cool, is some cases... and my gauges might not work but they is working well...

So I am assuming its the CKP or the cam shaft sensor... Is there an easy way to figure out which of the two it could be??

Any thought??

Thanks,
J

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post #2 of 9 Old 07-04-2010, 08:49 AM Thread Starter
jasonamorris
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i pulled the CEL numbers... ??

12,11,54,55
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post #3 of 9 Old 07-04-2010, 08:56 AM Thread Starter
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i also would like to add that i had the battery disconnected for a month or so and just installed new battery and terminals, would that cause any issues on the first day running??
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post #4 of 9 Old 07-04-2010, 11:39 AM
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post #5 of 9 Old 07-04-2010, 06:08 PM Thread Starter
jasonamorris
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would the crankshaft sensor be the only thing that allows it to work when cold and not turn over when hot? I'm pretty sure its just the crankshaft sensor but i want to make sure since i'm also getting the 54 code...
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post #6 of 9 Old 07-05-2010, 08:52 AM
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Last edited by Outatime05; 07-05-2010 at 09:02 AM.
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post #7 of 9 Old 07-05-2010, 09:21 AM
alextremetj
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A quick test to rule out a crank sensor, while cranking the motor, have someone feel the ASD relay. If you feel it click, then you know the ECM is getting a signal from the crank sensor.
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post #8 of 9 Old 07-05-2010, 09:46 AM Thread Starter
jasonamorris
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where is the asd relay? sorry...
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post #9 of 9 Old 07-05-2010, 12:39 PM
wushaw
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Power distrubution box under the hood by the battery.
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