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Jeep wont start, advice needed

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Old Oct 27, 2012 | 11:30 PM
  #16  
dom2007's Avatar
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Oh, and I almost forgot...

No, doesnt burn my *** to take advice from an ex-Navy guy. Not at this point anyways, lol. Hoo-yah!

Hell, if you can help me get the Jeep running, I wouldn't care less if you were a puddle-jumping coastie, lol.

Last edited by dom2007; Oct 28, 2012 at 07:40 AM. Reason: Changed Marine-jargon to Navy-jargon, lol.
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Old Oct 28, 2012 | 01:01 AM
  #17  
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From: connecticut
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if u changed the crank sensor and cam sensor did u change the oil ? after that
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Old Oct 28, 2012 | 06:44 AM
  #18  
ET JEEP's Avatar
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Year: 1997
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Engine: 4.0
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The problem you have may have to do with a bad PCM. Your symptoms are right on. Hard starting, starts sometimes and have checked everything but no fix. The problem may be bad capacitors in the PCM.

I have pointed out this fix to others with similar problems and on some it fixed their problem. Not sure if there is a year range for this problem but you may want to check this out.

BTW, score 2 hits from the Navy.

PCM Capacitors

Last edited by ET JEEP; Oct 28, 2012 at 07:10 AM.
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Old Oct 28, 2012 | 07:50 AM
  #19  
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No, didnt change the oil...that was changed about 4-500 miles ago.

As far as re-soldering the PCM, I don't think that would be impossible, but it very much gets into the time/money factor. I have only checked a couple places, but PCM's were running a couple-a few hundred bucks. I can't part with that kind of money at the moment(especially if it MIGHT not fix the problem. If I know for sure, that would be another matter), but I don't have the time to learn how to solder/build myself a new PCM. I will take a look at all the connectors today...I am gonna pull the coolant reservoir off for better access, then check everything I can that plugs into the PCM(or the PDC for that matter). Beyond that, it's back to working about 100-110 hrs a week, and paying for the Jeep to sit outside the shop, so I hope you guys understand my frusteration.

Like I said, anyone(besides the original mention about the bumper) interested in any parts? I would like to keep it to an all or nothing...it would really only be profitiable to sell most/all of the aftermarket crap, so let me know if anyone wants anything.

Last edited by dom2007; Oct 28, 2012 at 07:52 AM.
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Old Oct 28, 2012 | 08:28 AM
  #20  
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From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
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You do realize by not being grounded, you may have fried the PCM, don't you? Try a salvaged (Junkyard) one. Most yards will let you try a second one if the first one doesn't work.
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Old Oct 28, 2012 | 10:15 AM
  #21  
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Engine: 5.2l v8
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give me the year engine size and emissions type i can get a price real fast even tho its sunday
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Old Oct 28, 2012 | 04:56 PM
  #22  
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Originally Posted by dave1123
You do realize by not being grounded, you may have fried the PCM, don't you? Try a salvaged (Junkyard) one. Most yards will let you try a second one if the first one doesn't work.
Not really sure what you mean. I checked as many grounds as I could find...do you mean if I tried to start it and it wasnt grounded?

Ok, so update time(don't worry, plenty more shenanigans...)

I bring a different buddy over, he checks around a little bit, and for ****s and giggles, he swaps out a couple of the relays from the PDC. Whadda ya know? Starts right up. Keep in mind, I tried that before, but I guess he has the touch. So we drive it into the shop bay, pop the hood...seems everything is normal. He accidentally knocks the PDC(while the cover was on), and the Jeep dies. But it would restart every time. We figured we would take a drive around the block, but then it wouldn't start again. Aargh!! I can't figure out what changed...nothing that I could tell. I get one of the techs at the shop to help me figure this out...he narrowed it down to the fuel pump relay isn't getting any power to one of the posts. I am now stuck, as I am a retard with electrical systems. I don't know if power is stopping at the PDC, or if it stops at the PCM. It was explained to me that although possible, it is more likely for the components(the PDC, or PCM) to fail than the actual wiring. Does anyone agree with this. If so, then it seems that either my PDC or PCM is shot...yeah?
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Old Oct 28, 2012 | 04:57 PM
  #23  
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Originally Posted by mxpxpunkrock1987
give me the year engine size and emissions type i can get a price real fast even tho its sunday
its a 98 ZJ limited w/ 5.2L...dunno what you mean by emissions type.
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