How to install and adjust a 1998-1999 4.0 distributor? (CJ-7 MPFI upgrade) -
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 > How to install and adjust a 1998-1999 4.0 distributor? (CJ-7 MPFI upgrade)

XJ Rail Sale!The Ruffstuff NOT Universal 4 Link Kit!Vanco Big Brake Kit Promotion!

Unread 12-01-2011, 03:02 PM   #1
Colt44's Avatar
1983 CJ7 
Join Date: Aug 2010
Location: Memphis, TN, Tennessee, USA
Posts: 483
How to install and adjust a 1998-1999 4.0 distributor? (CJ-7 MPFI upgrade)

I know this is basic, but I haven't done this type of distributor before.

I'm moving from a hybrid EFI system that used the old CJ (Motorcraft) distributor to a new HESCO/MOPAR setup that uses the newer 98-99 type.

I'm familiar with installing the old type, setting the timing, etc. but the new one apparently only controls the injector timing. How should I install it, synch up with the #1 cylinder, etc.?

Most of the articles I've found talk about marking the position of the old one, etc. but obviously that is not possible here. I know it's probably a simple thing, I just need some instructions.

1983-91-94 CJ-7 Daily Driver
258 w/4.0 Head Conversion & MPFI
YJ OME Spring Conversion
YJ Interior, Metal Doors, Hard Top
Colt44 is offline   Reply With Quote Quick reply to this message
Unread 12-01-2011, 04:19 PM   #2
Registered User
1985 CJ7 
Join Date: Jun 2008
Location: Chicago area
Posts: 2,873
Yes you should line it up with cylinder #1 spark plug tower which is at the 5 oclock postion on the distribtutor then pull the indexing pin on the the timining plate. Benny at Hesco should be able to help you if you have problems.
gmakra is online now   Reply With Quote Quick reply to this message

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.