1991 5.0 HO Miata swap - Forums at Modded Mustangs
 
LinkBack Thread Tools
post #1 of 6 Old February 12th, 2018, 02:24 PM Thread Starter
Look Ma! My First Post!
 
Join Date: Feb 2018
Posts: 1
 
iTrader: 0 reviews
1991 5.0 HO Miata swap

Hello guys I'm new to this site. I'm building a 5.0 swapped Mazda Miata. I purchased a 1991 Thunderbird with a 5.0 HO and auto trans. I have stripped the drivetrain, ECU, wiring harness etc. My question is can I use the wiring harness and ECU if I'm using a T5 manual trans. I'm not sure if the harness can be modified into a "hotrod" harness or if I need to go with a different engine management system like Holley or Haltec etc. Thank you in advance!
Greg Johnson is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old February 12th, 2018, 08:35 PM
MM Fanatic
 
07gtS197's Avatar
 
Join Date: Mar 2011
Location: Naples, Fl
Posts: 4,468
Blog Entries: 3
     
iTrader: 5 reviews
You should be fine. I believe the only connectors that goes to the trans are the backup switch connector and the neutral safety switch. You can bypass the switch nss and the backup switch is probably the same thats on the t5.

07 GT Tungsten Gray

02 GT Mineral Gray

98 Crown Vic P71
07gtS197 is online now  
post #3 of 6 Old February 12th, 2018, 09:12 PM
I Post Entirely Way Too Much
 
Join Date: Aug 2008
Posts: 22,778
                     
iTrader: 8 reviews
There isn't a neutral safety switch on a T5 if I remember correctly, only the backup sensor.
BA Mustang is offline  
Sponsored Links
Advertisement
 
post #4 of 6 Old February 12th, 2018, 09:21 PM
MM Fanatic
 
07gtS197's Avatar
 
Join Date: Mar 2011
Location: Naples, Fl
Posts: 4,468
Blog Entries: 3
     
iTrader: 5 reviews
Quote:
Originally Posted by BA Mustang View Post
There isn't a neutral safety switch on a T5 if I remember correctly, only the backup sensor.
They do. Regardless if hes using the auto ecu it will be looking for the mlps/nss signal showing that the transmission is in either park or neutral or it wont start. It will need to be bypassed or else it will not start.

I was actually referring to the mlps on the side of the transmission on the aod. It is sometimes called a neutral safety switch but thats only one of its functions.

07 GT Tungsten Gray

02 GT Mineral Gray

98 Crown Vic P71
07gtS197 is online now  
post #5 of 6 Old February 14th, 2018, 11:31 PM
Qwik Enuff
 
wbrockstar's Avatar
 
Join Date: Oct 2013
Location: Nashville Tn
Posts: 771
   
iTrader: 0 reviews
Quote:
Originally Posted by BA Mustang View Post
There isn't a neutral safety switch on a T5 if I remember correctly, only the backup sensor.
The T5 doesnt have a nss,but it does havep a neutral gear switch.I dont know if the Thunderbirds and Miatas use them or not,but the (T5) Mustangs use a clutch safety switch & neutral gear switch.The CSS is at the clutch pedal & the NGS is at the T5.The following link details these switches.
NSS/Clutch Pedal Switch Code 67 Troubleshooting

91 LX 342ci (10.5:1)
TFS 190cc (stage ll)
TFS Track Heat
Lunati 61011(.549"/.565")
Flowtech 1 3/4" Shorties
QA1 Coilovers
Weld ProStar XP'S

ISIT EVER ENUFF
wbrockstar is offline  
post #6 of 6 Old February 17th, 2018, 11:24 AM
MM Fanatic
 
fb93's Avatar
 
Join Date: Jul 2011
Location: PA
Posts: 3,351
             
iTrader: 0 reviews
IIRC, the o2 sensor harness for the auto vs. manual are pinned differently, and using the wrong one could kill the ECU.

Found this.
O2 Sensor Harness Differences - Ford Mustang Forums : Corral.net Mustang Forum
fb93 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Forums at Modded Mustangs 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.

Email Address:
OR

Log-in










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 On
Pingbacks are On
Refbacks are On

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