1987 jeep wrangler 4.2 no spark - JeepForum.com

 
LinkBack Thread Tools
post #1 of 13 Old 07-04-2012, 04:49 PM Thread Starter
dsims1987
Registered User
 
Join Date: Jul 2012
Posts: 6
1987 jeep wrangler 4.2 no spark

Have replaced ignition control module the ignition coil spark plugs ignition switch pick up coil rotor and distributor cap still nothing anyone have any ideas?

dsims1987 is offline  
Sponsored Links
Advertisement
 
post #2 of 13 Old 07-04-2012, 09:21 PM
kilo1974
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2012
Location: ogallala
Posts: 26
May be a beating a dead horse here but,, have you pulled off dizzy cap and cranked engine over to see if your rotor is rotating,,, you may have a broken pinion gear on your distributor,,, just a thought..
kilo1974 is offline  
post #3 of 13 Old 07-04-2012, 09:30 PM Thread Starter
dsims1987
Registered User
 
Join Date: Jul 2012
Posts: 6
Yep I did its still spinning
dsims1987 is offline  
post #4 of 13 Old 07-04-2012, 09:41 PM
kilo1974
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2012
Location: ogallala
Posts: 26
And you have no blown fuses or anything??,, I had an issue similar to that with an early 90 's full size suburban,, turned out that my ecumenical fuse was blown,, thus no spark, but plenty of crank,, go figure..
kilo1974 is offline  
post #5 of 13 Old 07-04-2012, 09:52 PM Thread Starter
dsims1987
Registered User
 
Join Date: Jul 2012
Posts: 6
I was thinking the only thing left to change is the computer but someone told me I could change the ignition system out and bypass the computer have you ever heard of that ? And yes checked the fuses.
dsims1987 is offline  
post #6 of 13 Old 07-04-2012, 10:04 PM
kilo1974
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2012
Location: ogallala
Posts: 26
Bypassing the computer is something that us with 85 to 95 wranglers and cjs do to put your jeep back to a pre 82 or so state of mind,,,it's referred to as the nutter bypass,,, very effective solution to the computer controlled ignitions and carburetors of the early (experimental) 90 's,,, look up nutter bypass in the forum home page,,, and look for an article written by mike romaine,,, very helpfull if you are starting from the beginning ..hope the info gets you going in the right direction,, happy jeepin
kilo1974 is offline  
post #7 of 13 Old 07-04-2012, 10:08 PM Thread Starter
dsims1987
Registered User
 
Join Date: Jul 2012
Posts: 6
Thanks for the info will do
dsims1987 is offline  
post #8 of 13 Old 07-04-2012, 10:14 PM
kilo1974
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2012
Location: ogallala
Posts: 26
The only thing tricky about the write up on the bypass is the color on the wiring,, there is a minor discrepency between cj and wrangler as far as the colors,,, if you get into it hit me up and I will do my best to help,,,, I did the bypass on my 90 wrangler 4.2 some time ago and had nothing but good results in the end..
kilo1974 is offline  
post #9 of 13 Old 07-05-2012, 11:15 AM Thread Starter
dsims1987
Registered User
 
Join Date: Jul 2012
Posts: 6
Tank you so much it's running now but none of my gauges work is that part of bypassing the computer or seperate problem
dsims1987 is offline  
post #10 of 13 Old 07-05-2012, 11:35 AM
kilo1974
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2012
Location: ogallala
Posts: 26
That would be something different,, be sure to wrap all connections well and check all connections..you may have unplugged something accidentally.
kilo1974 is offline  
post #11 of 13 Old 07-05-2012, 04:37 PM Thread Starter
dsims1987
Registered User
 
Join Date: Jul 2012
Posts: 6
20 amp fuse and they are working thanks for all your help
dsims1987 is offline  
post #12 of 13 Old 07-05-2012, 06:18 PM
kilo1974
Registered User
1990 YJ Wrangler 
 
Join Date: Jun 2012
Location: ogallala
Posts: 26
Awesome to hear your guage issue was a fuse, also glad to hear that you got the jeep going again,, happy jeepin friend
kilo1974 is offline  
post #13 of 13 Old 07-05-2012, 09:15 PM
cruiser54
Web Wheeler
 
cruiser54's Avatar
1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott
Posts: 11,157
Do a GM HEI distributor conversion and don't look back.
cruiser54 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome