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Fox Computer Swap with Transmission

  • Thread starter Thread starter Barron91lx
  • Start date Start date Dec 22, 2018
  • Tags Tags
    computer manual transmission t-5 swap

Barron91lx

Member
Dec 21, 2018
26
3
13
Newton, KS
Dec 22, 2018
#1
  • Dec 22, 2018
  • #1
Is it necessary to swap out computers when converting to a manual transmission? I recently realized my car was originally an automatic.

Thanks
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,848
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polk county florida
Dec 22, 2018
#2
  • Dec 22, 2018
  • #2
How does it run?
there is something about the o2 wires, something about a jumper, what year are we talking about and what computer is in it now?
 

Barron91lx

Member
Dec 21, 2018
26
3
13
Newton, KS
Dec 22, 2018
#3
  • Dec 22, 2018
  • #3
General karthief said:
How does it run?
there is something about the o2 wires, something about a jumper, what year are we talking about and what computer is in it now?
Click to expand...
it's a 91 LX 5.0. It has a new engine with 500 miles and doesn't run that good until it gets warm. This is similar to how it ran before the new engine. I don't know what computer it has yet, I haven't looked. I'm just curious since I found out it was an auto to begin with
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,848
10,528
203
polk county florida
Dec 22, 2018
#4
  • Dec 22, 2018
  • #4
Have you checked for codes?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,179
17,884
224
Massachusetts
Dec 22, 2018
#5
  • Dec 22, 2018
  • #5
Not necessary. I swapped mine 10 years ago and still retain the AOD complete. Changing over to the manual ECU requires swapping a hardness and repinning the o2 sensor harness jumper, but it should run fine with AOD ECU.

I'd pull the codes to start and see if anything comes up as a first step
 
Reactions: General karthief

Barron91lx

Member
Dec 21, 2018
26
3
13
Newton, KS
Dec 22, 2018
#6
  • Dec 22, 2018
  • #6
General karthief said:
Have you checked for codes?
Click to expand...
Yes, there are a few popping up, as usual. I'll recheck the codes and post.
 

Mstng93SSP

You have a nice rear end there Dave.
15 Year Member
Nov 29, 1999
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Mililani, Hawaii
Dec 23, 2018
#7
  • Dec 23, 2018
  • #7
As I understand it, the ecu is compatible with the wiring harness specific to that ecu. When swapping trans you don't touch the wiring harness or ecu, and the ecu could care less what transmission is in the car as long as it has the correct wiring harness to go with the ecu. So, if you swapped out the ecu, and didn't swap out the wiring harness that goes with that ecu (I think it's the 02 sensor portion of the harness that might be specific to the ecu) then you would ave a problem.
 

fredfifty

5 Year Member
Nov 23, 2011
318
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59
SF Bay Area
Dec 24, 2018
#8
  • Dec 24, 2018
  • #8
good site here
http://ponyperformance.com/

go to technical then o2 sensor harness identification
 
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