TBI computer controled distributor on 4.2L? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Brand Specific Tech > Jeep - Non Hardcore
Notices

Reply
 
Share Thread Tools Display Modes
Old 07-19-2012, 10:14 PM   #1 (permalink)
Registered User
 
Join Date: Dec 2001
Member # 8867
Location: Los Angeles CA
Posts: 499
Send a message via AIM to YJ4LIFE Send a message via Yahoo to YJ4LIFE
Question TBI computer controlled distributor on 4.2L?

Is there a way to get the TBI computer to control the timing on a 4.2L? Do you just need a GM distributor? Why wouldn't the howell kit include something like that?
__________________
-Taz, '89 YJ

Last edited by YJ4LIFE; 07-19-2012 at 10:17 PM. Reason: typo
YJ4LIFE is offline   Reply With Quote Quick reply to this message
Old 07-20-2012, 12:54 PM   #2 (permalink)
CSP
Registered User
 
Join Date: Aug 2000
Member # 1533
Location: Parker, CO
Posts: 2,862
The stock distributor can be modified to do this. The mechanical advance springs need to be welded to prevent mechanical advance and the vacuum advance can just be disconnected from the vacuum line. At that point the purple and orange wires on the stock distributor are connected to the correct terminals on the GM 7-pin or 8-pin ignition module.

Your TBI system must first have this capability. Howell, for whatever reason, has just made the choice NOT to allow for computer controlled spark. You'd have to ask them why.

Affordable Fuel Injection's kits do control spark timing.

Last edited by CSP; 07-20-2012 at 12:56 PM.
CSP is online now   Reply With Quote Quick reply to this message
Sponsored Links
Old 08-02-2012, 09:44 AM   #3 (permalink)
Zeus of the Sluice
 
the freeak's Avatar
 
Join Date: Jan 2005
Member # 41185
Location: In the garage
Posts: 3,064
Can the Howell system be retrofit to the OEM style where timing is controlled, or is the wiring/ ECM an issue?
the freeak is offline   Reply With Quote Quick reply to this message
Old 08-06-2012, 03:43 PM   #4 (permalink)
CSP
Registered User
 
Join Date: Aug 2000
Member # 1533
Location: Parker, CO
Posts: 2,862
You would have to add wiring to the Howell harness and reprogram the ECM to incorporate spark timing. I did it to the Howell kit in my CJ.
__________________
75 CJ5, 258, T18a, 4.27's, Warn 8274, Howell EFI
CSP is online now   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum 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 email address for yourself.

** A VERIFICATION EMAIL IS SENT TO THIS ADDRESS TO COMPLETE REGISTRATION!! **

Email Address:

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.



Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 05:53 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.