Are all ECM's created equal? - JeepForum.com
 3Likes
  • 2 Post By John Strenk
  • 1 Post By John Strenk
 
LinkBack Thread Tools
post #1 of 4 Old 09-27-2021, 11:54 AM Thread Starter
Renegade82
Registered User
 
Renegade82's Avatar
1982 CJ7 
 
Join Date: Apr 2011
Location: Lewistown
Posts: 5,132
Garage
Are all ECM's created equal?

Are all the ecm's the same for all the years they used them (83-86)? Or were there different programming used? I have a unit that's basically a spare for the wifes Jeep, should I ever need it. I want to mark it's box for future reference but I got to thinking they may be different for the year for some reason. Not sure what year the one I have came from.


The end of a defining era.... JEEP R.I.P. 1941-1986
My frame off Re-Build: (the 4 year saga....)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Renegade82 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 09-28-2021, 04:24 AM
John Strenk
Moderator
 
John Strenk's Avatar
1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 22,743
Probably will have to check a dealers part catalog to see if there are any different variations. there may be a 48 state version and a California version and an export version.
Renegade82 and Matt1981CJ7 like this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


I drive a Prius to save money and buy more Jeep Parts....
John Strenk is online now  
post #3 of 4 Old 09-28-2021, 08:56 AM Thread Starter
Renegade82
Registered User
 
Renegade82's Avatar
1982 CJ7 
 
Join Date: Apr 2011
Location: Lewistown
Posts: 5,132
Garage
That's kinda what I was thinking. Maybe even a high altitude / low altitude version also. Not sure what all it controls besides the factory carb and vacuum switches.

The end of a defining era.... JEEP R.I.P. 1941-1986
My frame off Re-Build: (the 4 year saga....)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Renegade82 is offline  
 
post #4 of 4 Old 09-28-2021, 09:16 AM
John Strenk
Moderator
 
John Strenk's Avatar
1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 22,743
It also controls the spark advance on the later ones. Some of the early California ones only controlled the mixture.

They were smart enough to recognize a knock in a cylinder and retard the timing to compensate. How ever as the knock sensor aged they became more sensitive and even thing like valvetrain noise would cause the timing to retard when it wasn't needed.
Renegade82 likes this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


I drive a Prius to save money and buy more Jeep Parts....
John Strenk is online now  
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











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