HELP! NO SPARK GOING INTO IGNITION COIL what could it be?! - JeepForum.com
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Unread 03-05-2013, 12:24 PM   #1
DAjeep88
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HELP! NO SPARK GOING INTO IGNITION COIL what could it be?!

I have a 1988 jeep wrangler yj 4.2, 5 speed manuel and yesterday it decided not to start. I already replaced the ignition control module and ignition coil and even the distributer and im still not getting any spark going into the ignition coil. Any suggestions?

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Unread 03-05-2013, 12:51 PM   #2
Que89YJ
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1989 YJ Wrangler 
 
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Do you have power at the coil? You have no info in the profile. Do you have it nuttered?
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Unread 03-05-2013, 01:52 PM   #3
DAjeep88
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No I dont have any power at the coil and it isnt nuttered
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Unread 03-05-2013, 02:09 PM   #4
vadslram
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1990 YJ Wrangler 
 
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Spark INTO the coil. Well there is your problem! it shouldn't be sparking into the coil but only out of the distributor

Try hot wiring it. ID the positive secondary lead to the pickup in the distributor and run a wire straight from the battery. If that doesn't work your coil or the pickup is bad. If it does work suspect the ignition switch.

In the old days of points it was a pretty simple thing to diagnose since you could see all the players and if they were working. Now you have to take it on faith that the inductor tooth is activating the pickup and that the voltage is being interupted when it's supposed to.
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Unread 03-05-2013, 05:36 PM   #5
Old4X
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1990 CJ7 
 
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No power to coil = burned out ballast resistor. Get a wiring diagram and repair the open wire.
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Unread 03-05-2013, 06:02 PM   #6
DAjeep88
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Well you know what I meant lol I didnt want to make it complicated but okay ill try that but I don't know which is the pickup? And run a wire straight from the battery to the positive end of the ignition coil?
Quote:
Originally Posted by vadslram View Post
Spark INTO the coil. Well there is your problem! it shouldn't be sparking into the coil but only out of the distributor

Try hot wiring it. ID the positive secondary lead to the pickup in the distributor and run a wire straight from the battery. If that doesn't work your coil or the pickup is bad. If it does work suspect the ignition switch.

In the old days of points it was a pretty simple thing to diagnose since you could see all the players and if they were working. Now you have to take it on faith that the inductor tooth is activating the pickup and that the voltage is being interupted when it's supposed to.
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Unread 03-05-2013, 06:04 PM   #7
DAjeep88
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Quote:
Originally Posted by Old4X View Post
No power to coil = burned out ballast resistor. Get a wiring diagram and repair the open wire.
Really ballast resistor okay ill check it out do you know a link where I might find a wiring diagram?
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Unread 03-06-2013, 06:54 AM   #8
vadslram
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Is your ignition stock or has it been nuttered / HEI/ big capped?
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Unread 03-06-2013, 07:17 AM   #9
DAjeep88
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Its stock and what is hei?
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Unread 03-06-2013, 12:29 PM   #10
Que89YJ
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High energy ignition. If you can filll out your profile. It really helps us help you.
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Unread 03-06-2013, 01:04 PM   #11
vadslram
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1990 YJ Wrangler 
 
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If you aren't sure about the electrical and bought this used (like 99% of us) I would recommend you search for all the "nuttering" info you can. There is a good possibility that this electrical mod was already done on your rig and maybe one of the connections made by the PO has gone bad. We can't help you there because there are way too many bonehead things we all do but can't explain.
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Unread 03-06-2013, 01:37 PM   #12
Que89YJ
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1989 YJ Wrangler 
 
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http://www.jeepforum.com/forum/f12/p...bypass-476720/
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Unread 03-06-2013, 09:31 PM   #13
DAjeep88
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Quote:
Originally Posted by vadslram View Post
If you aren't sure about the electrical and bought this used (like 99% of us) I would recommend you search for all the "nuttering" info you can. There is a good possibility that this electrical mod was already done on your rig and maybe one of the connections made by the PO has gone bad. We can't help you there because there are way too many bonehead things we all do but can't explain.
You know what you make alot of sense it might be nuttered im going to check in the morning.
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Unread 03-06-2013, 09:32 PM   #14
DAjeep88
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Quote:
Originally Posted by Que89YJ View Post
High energy ignition. If you can filll out your profile. It really helps us help you.
Thanks! And will do..
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Unread 03-06-2013, 09:41 PM   #15
DAjeep88
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One thing that im curious about is if I redo or for that matter do a nutter what would I need to get? ...also would my starter relay have anything to do with me not getting any voltage to my ignition coil???
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help needed , ignition , ignition coil , no spark

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