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Unread 06-06-2013, 06:37 PM   #1
bigtom89
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1988 YJ Wrangler 
 
Join Date: Dec 2012
Location: fort myers, florida
Posts: 20
No spark!!!

Ok guys,
1988 Jeep YJ with a 4.2 that's been nuttered. 3 weeks ago I hit an exposed manhole that cause me to lose all power in the Jeep. I have replaces the fuseable links, ICM, coil and complete distributor and still no spark. The motor turns over but still no spark. I have pulled every fuse to make it was still good. Any suggestions, or ways to direct wire it?

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1988 Wrangler YJ, 4"lift on 33" BFG Mud Terrians
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Unread 08-06-2013, 06:33 AM   #2
123YJ
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1989 YJ Wrangler 
 
Join Date: Aug 2011
Location: Mount Wolf, PA
Posts: 40
Quote:
Originally Posted by bigtom89
Ok guys,
1988 Jeep YJ with a 4.2 that's been nuttered. 3 weeks ago I hit an exposed manhole that cause me to lose all power in the Jeep. I have replaces the fuseable links, ICM, coil and complete distributor and still no spark. The motor turns over but still no spark. I have pulled every fuse to make it was still good. Any suggestions, or ways to direct wire it?
Dealing with similar problem (ie: randomly stalling out, will crank over but not fire up...and it's progressively getting worse). Replaced coil since I was getting no spark out of coil but still having 12 volts going to the coil. Negative lead to coil shows 35 ohms. My research indicates a bad ICM. Some have shared they bought a bad new ICM and replaced it several times.

I'm now looking into the HEI distributer, which eliminates the external ICM & coil.
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Unread 08-06-2013, 07:12 AM   #3
cruiser54
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1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 10,246
Quote:
Originally Posted by 123YJ View Post
Dealing with similar problem (ie: randomly stalling out, will crank over but not fire up...and it's progressively getting worse). Replaced coil since I was getting no spark out of coil but still having 12 volts going to the coil. Negative lead to coil shows 35 ohms. My research indicates a bad ICM. Some have shared they bought a bad new ICM and replaced it several times.

I'm now looking into the HEI distributer, which eliminates the external ICM & coil.
Get an HEI. They run so much better with it.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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Unread 08-06-2013, 10:36 AM   #4
123YJ
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1989 YJ Wrangler 
 
Join Date: Aug 2011
Location: Mount Wolf, PA
Posts: 40
Quote:
Originally Posted by cruiser54

Get an HEI. They run so much better with it.
Cruiser54,

Just ordered a CRT Performance HEI for my '89 4.2L I-6 an hour ago. Hopefully this will solve the problem.

Thanks for the suggestion.

Rick
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Unread 08-06-2013, 06:47 PM   #5
cruiser54
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1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 10,246
Quote:
Originally Posted by 123YJ View Post
Cruiser54,

Just ordered a CRT Performance HEI for my '89 4.2L I-6 an hour ago. Hopefully this will solve the problem.

Thanks for the suggestion.

Rick
You will not be disappointed.
__________________
Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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4.2 liter , coil , ignition , spark , YJ

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