ford mustang 2011 4.0 v6 - Ford Mustang Forums : Mustang Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 09-13-2018, 08:02 PM Thread Starter
Registered User
Trader Feedback: (0)
Join Date: Sep 2018
Posts: 1
Post ford mustang 2011 4.0 v6

having trouble with ths one pcm not commuicting says protolcal interal failure please help i have checked all grounds ive checked all relays all fuses are also good but still will not run it acts like it wants to but doesnt on my scaner in the data it says the coolant temp is hot i unpluded it no change i work at a shop and been doing kinda work for years but this is the first time ive havnt been able to figure it out someone tell me what ive missed

daniel1214 is offline  
Sponsored Links
post #2 of 2 Old 09-14-2018, 09:58 AM
Registered User
indy2000's Avatar
Trader Feedback: (3)
Join Date: Oct 2001
Location: vancouver
Posts: 21,304
you need the 5volt ref for comm

a shorted sensor or shorted 5v ref will cause a no comm

unplug the act or ect, whatever is easiest, and see if the 5v is there

key in run

89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
indy2000 is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forums : Mustang 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.

Email Address:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
1995 Mustang SVT Cobra Project kyb88 SVT & DOHC 0 09-03-2011 07:41 PM
For Sale Brand New Jet Performance Ford programmer #15043 j.largent87 Electronics and Entertainment 3 06-27-2011 10:59 PM
2011 NMRA Ford Nationals Series Schedule Announcement!! jeff conley Drag Racing 14 11-28-2010 12:41 PM

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