Intermittent Spark on Cyl 1 and 6 -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > Models > Jeep CJ Forum > Intermittent Spark on Cyl 1 and 6

Summer is Over! Time for a saleIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed LineIron Rock Offroad products - get them from Kolak!

Unread 03-17-2012, 09:55 AM   #1
Registered User
1986 CJ7 
Join Date: Mar 2012
Location: Miami, FL
Posts: 2
Intermittent Spark on Cyl 1 and 6

I am stuck. Read as many forum post as I could before I started going blind.

I have an 86, CJ-7, 258, fully nuttered, Weber 32/36 carb, Generic HEI dizzy.

Was running fine, went playing at Big Cypress, then started running extremely poorly (power loss, back firing, etc)

On cyl 1 and 6, using an inline spark detector, I am getting intermittent spark. Rest of the cyls look ok. Engine starts fine. Engine idles with obvious miss. Can drive but lots of hesitation and back firing.

I have replaced cap & rotor (Accel 8129), ignition module (BWD CBE4z), plugs (Autolite 985), rotated wires (MSD Street Fire - all ohms < 9), and nothing changes (now I have two sets of everything )....

I have also hooked directly from battery to dizzy and no change....

Timing is at 10

I can disconnect the # 1 while engine is running, and really can't hear a change (same with # 6).... others are noticeable.... I am amazed at this engine!

As it is spark related, I cannot see that it can be anything else but ignition...

Any thoughts?

cj7inflorida is offline   Reply With Quote Quick reply to this message

258 , cj , hei , miss , spark

Quick Reply

Register Now

In order to be able to post messages on the 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.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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.

Thread Tools

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.