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post #1 of (permalink) Old 12-09-2000, 12:06 PM Thread Starter
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follow up to dying cj...still need help

i replaced the module (got it at napa). started it up. let it idle for 15 min. or so....everything great. took it for a drive and it TOTALLY died about 3 miles down the road. before it would at least only throw these fits intermitently, but now it went and is done! won't start - nothing. and they checked the new one at the store before i bought it and said it worked. (unfortunitely i didn't have the old one there to test) sooo....now what? any ideas? i think i may try puttin gthe old one back in again and atleast try to limp it home.

thanks everyone.

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post #2 of (permalink) Old 12-09-2000, 12:12 PM
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Re: follow up to dying cj...still need help

I had a GM car once that would toast modules. Its been over twenty years, so I can't remember the exact details, but it had something to do with a bad resistor somewhere along the way letting too much voltage in to the module. Like I said, I don't remember the details, but this may help. Maybe some of the guys with more elctronic ignition expertise may be able to follow this up.

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post #3 of (permalink) Old 12-09-2000, 02:21 PM Thread Starter
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Re: follow up to dying cj...still need help

upon further inspection, the wire from the selenoid to the coil and the other wire from the top of coil are fried. the insulation is completely burned off for the length of the wire. soooo...did i get the wrong module or is there some other problem here? ...maybe a combination of several problems?

thanks everyone.
shawn


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post #4 of (permalink) Old 12-09-2000, 03:47 PM
 
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Re: follow up to dying cj...still need help

I suspect your problem all along has been one of htose wires, with the little spot of insulation melted or worn off, boucing and shorting out on teh valve cover.

splice those wires as far down into the loom as you need to goto find good wires, and try it again.

checlk the rest of them too, ive never seen an AMC harness in good shape.



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post #5 of (permalink) Old 12-09-2000, 04:21 PM Thread Starter
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Re: follow up to dying cj...still need help

actually it melted the insulation off the entire length of the wires (2 or 3 ft long!) since they are melted all the way into the coil i'm guessing the coil will have to be replaced. so do you think that this all could be from a short, that eventually grounded itself so long that it melted the wires? or do you think it would be a faulty part somewhere? if i were to go ahead and do the TR upgrade now, wouldn't that replace about all the parts that could be faulty?

thanks
shawn

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post #6 of (permalink) Old 12-09-2000, 04:51 PM
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Re: follow up to dying cj...still need help

Not necessarily. The basic TR upgrade really only replaces the cap/rotor and the coil (so yes, you would have a new coil). However, it sounds like you may have more of a problem than just that. Even with the TR Upgrade, you still re-use the original power and ground wires that attach to the coil, so you'd still need to re-wire or splice new wires into your harness. Another adaptation of the TR Upgrade allows for the use of a MSD ignition module as well as the above mentioned parts. But, depending on what the source of your problem may be, you could very well end up frying these new parts just as quicklyl and be out even more money.

Sorry that I can't offer much help in the way of determining what might be the culprit with your Jeep, but thought I'd let you know that the TR Upgrade may replace a couple parts, but not everything, and in effect may just be a waste of money at the moment if something else is causing your electrical problems.

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post #7 of (permalink) Old 12-10-2000, 02:53 PM Thread Starter
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Re: follow up to dying cj...still need help

well an MSD is out of the question right now anyway. but if I do the TR upgrade and fix the wiring, that should take care of it right?

thanks for the help
shawn

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post #8 of (permalink) Old 12-10-2000, 02:56 PM
 
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Re: follow up to dying cj...still need help

it will fix it or point you closer to teh actual problem.

make sure the new module is grounded well, and not getting too hot.

if it dies again just leave the key on, and hop out and see if you have voltage at the coil.



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post #9 of (permalink) Old 12-10-2000, 03:11 PM
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Re: follow up to dying cj...still need help

First off......fix the wire!
This has to be done one way or the other. If all is well, then do your TR upgrade. If not you can go on to finding the next problem.
I would say that it'll be OK, but you won't know untill you fix the wire and try it.

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