Changing out the Bronco Computer ECU - Ford Bronco Forum
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 10-25-2009, 06:13 PM Thread Starter
Retired Staff
bossind's Avatar
Join Date: Oct 2004
Location: Oromocto NB Canada
Posts: 8,545
Bronco Info: 1996 EB Bronco, 5.8, E40D, Dana 44 SAS, 4.88 gears. 35" SuperSwampers
iTrader: (3)
Changing out the Bronco Computer ECU

Changing from a 5.0 to a 5.8L engine requires swapping out the ECU

The best way to do this is through the drivers side wheel well by loosing off the plastic inner fender as shown

I label all my computers when I remove them so I didn't get them mixed up.

Pulling back the plastic inner fender you will have access to the computer harness, this requires a 10mm socket to remove. Next you remove 2-11mm nuts on ECU rubber gourmet, remove the grommet and pullout the ECU. Here the ECU is already removed

Slide in the new ECU

The rubber grommet, notice the marking for "top".

Reinstall the grommet, nuts and tighten down the harness and the ECU is installed.

Last edited by bossind; 10-28-2009 at 09:34 PM.
bossind is offline  
Sponsored Links
post #2 of 4 (permalink) Old 04-05-2011, 11:45 PM
Dustball's Avatar
Join Date: Mar 2003
Location: Minnesota (it's not so cold here)
Posts: 5,123
iTrader: (29)
Adding another picture showing where the ECM is in relation to the firewall/fender for the 87-91 trucks-

Dustball is offline  
post #3 of 4 (permalink) Old 04-06-2011, 12:00 AM
Roller rockers are gay
TheUnforgiven's Avatar
Join Date: Aug 2004
Location: Woodridge, Illinois
Posts: 19,281
Bronco Info: 2005 Chevrolet Venture, 1997 Acura TL, 1994 Chevy Caprice
iTrader: (11)
why would you want to jack up the truck, take the tire off, pull the inner fender panel? when one could have at that bolt with a quarter inch ratchet and a 10mm socket from the top and have the computer swapped out in 5 minutes? ask me how i know.

however, good write-up. there's more than one way to skin a cat.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
Originally Posted by "Bronco" John Galt View Post
New nuts are in the plan.
"Kids, they see the good in everything and through their eyes, they open ours." - Hank Davis

"To be easily amused is to live most of your life smiling."
TheUnforgiven is offline  
post #4 of 4 (permalink) Old 04-07-2011, 03:43 AM
Registered User
"Bronco" John Galt's Avatar
Join Date: Sep 2010
Location: Marina Del Rey, CA
Posts: 1,451
Bronco Info: 87 FSB, Tru-Trac, Eaton Posi, built 306, MAF, 4" Pro Comp, 33" BFG
iTrader: (16)
Not sure if its allowed to post pics on someone's tech thread, if this is a violation, I apologize. Since the thread was started, didn't see a point in starting a new one. Like Unforgiven said, more than one way to skin a cat, might as well keep all the pelts here.

Basically, to change out the EEC, I just access from the top:

My truck is an '87, and has an MAF adapter, but the principle is the same. In the first pic, the vacuum canister is attached (silver drum looking thing on the right hand side, lower right corner of the pic). There are just two bolts there, also 10mm IIRC, but if they aren't, just use the proper size socket. (disregard the wiring/hose mess..I only posted these pics because they were handy, and I happened to be in this forum for something else and saw the heading, checked out the thread, agreed with Unforgiven, and went back to my thread and grabbed these quicklike...yada yada yada...)

Once that is out of your way, access to the front of the EEC is painless.

Then you remove the driverside kick panel from in the cab, and pull the EEC out from inside.

*EDIT* Bossind...did you also write down which model of computer you have? You may also need that information for certain things. That number is on the plastic pin connector housing. This one is a C3W1:

"Bronco" John Galt is offline  

  Ford Bronco Forum > Bronco Discussions > Technical Write Ups

Quick Reply

Register Now

In order to be able to post messages on the Ford Bronco 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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself. DO NOT USE accounts. If you only have a email please contact the administrator here

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not 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

For the best viewing experience please update your browser to Google Chrome