88 4.2 YJ Ignition Module questions - Page 2 - JeepForum.com
LinkBack Thread Tools
post #16 of 19 Old 11-08-2011, 09:00 AM
Registered User
2010 JK Wrangler 
Join Date: Jan 2008
Location: Mazomanie
Posts: 70
Got a pretty similar thing going on jeepjon. Im going to start working on it tommow. Ill post here the results

snag is offline  
Sponsored Links
post #17 of 19 Old 11-08-2011, 09:30 AM
Web Wheeler
timatoe's Avatar
1990 YJ Wrangler 
Join Date: Aug 2006
Location: Grass Valley
Posts: 16,132
Originally Posted by JeepJon15 View Post
But is the HEI alone gunna help if i dont upgrade everything else right away?
Yes, because you're getting rid of the failure prone ICM, you can update everything else later.....

Here's some help.... http://www.jeepforum.com/forum/f12/n...today-1217045/

Originally Posted by George Orwell
We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm.
timatoe is offline  
post #18 of 19 Old 11-08-2011, 11:08 AM
Registered User
1990 YJ Wrangler 
Join Date: Jun 2008
Location: st. louis
Posts: 2,116
Originally Posted by JeepJon15 View Post
One more thing i thought of that may or may not be connected. Sometimes when i turn the key to start the jeep it seems like theres a power surge where it turns very slowly then speeds up and fires up. As its struggling my lights typically dim a bit then get full power back between engine turns. The starter is only about a year old, maybe a little less. Battery i think is from 04, but can a battery cause shut off problems? It does seem to die rather quickly when trying to get her started on bad days.
That is the classic symptom of bad battery cables. Either replace them or at least replace the ends. If they look original or over 10 years old, just replace them.

Grounding the ignition module like 4x said made a big difference in how mine ran.

I put a new cap, rotor and plug wires on mine when I bought it so put off the Team Rush upgrade for a long time, but it made a big difference too when I finally did it.
dancytron is offline  
post #19 of 19 Old 11-08-2011, 09:27 PM
Registered User
Join Date: Nov 2011
Location: Port Orchard
Posts: 40
I once had very similar symptoms on a 76 CJ5. After the engine was warmed up if I hit a bump in the road it would die and not restart for 20 to 30 minutes. Took me forever to figure that one out but it turned out to be a bad connection in the wiring coming out of the distributor at the connection to the wiring harness. If it is nuttered, check all of your connections and especially connections affected by heat from the engine getting hot.

Just my 2 pennies.
wizekrakr is offline  

4.2 , ignition module , shut off , starting problems , YJ

Quick Reply

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


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

Email Address:


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

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
ignition module 612 YJ Wrangler Technical Forum 2 03-04-2009 08:56 PM
89 4.2 Ignition module ?'s hillside250 YJ Wrangler Technical Forum 10 12-09-2008 07:16 PM
89 4.2l ignition module maybe??? drews0311 YJ Wrangler Technical Forum 12 07-29-2007 11:46 PM
ignition module went out... BillR YJ Wrangler Technical Forum 0 10-04-2006 06:35 AM
Ignition Module - Help??? JeepR92 YJ Wrangler Technical Forum 12 10-06-2004 10:43 PM

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