• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

what da hell..... TFI Module Question

  • Thread starter Thread starter crunchie12268
  • Start date Start date Dec 18, 2004
C

crunchie12268

New Member
Aug 4, 2004
599
0
0
Manhattan, KS
Dec 18, 2004
#1
  • Dec 18, 2004
  • #1
I was wondering what happens when a TFI goes bad, or what the symptoms of a bad module are. Can I notice a difference in performance if mine is bad? will it still run?
 
O

outlawjay

20+ Year Stangneter
Dec 2, 2004
104
7
19
Atlanta
Dec 18, 2004
#2
  • Dec 18, 2004
  • #2
I think if anything is wrong with it then it just won't work.
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
Dec 18, 2004
#3
  • Dec 18, 2004
  • #3
TFI modules can quit cold and keep the car from running.

However, the most common failure mode is to start missing above 3500 RPM when warm.

They sometimes require a special Torx screwdriver bit to remove them - $5-$6 at the auto parts store. Othertimes, it's just a good 1/4" deep socket.

Clean the distrubutor mount pad good & use plenty of the white heat sink grease when you put a new one on or re-install the old one.
 
You must log in or register to reply here.

Similar threads

C
Engine Idle cuts out
  • claypoolxx
  • Mar 7, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
25
Views
910
Fox 5.0 Mustang Tech Jul 24, 2026
alutwon
J
Engine Tuning...?
  • justadude07
  • May 30, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
315
Fox 5.0 Mustang Tech Aug 21, 2026
Qtrhrse23
F
Fox 1990 Mustang GT 5.0 A9L – Engine suddenly shuts off but immediately restarts when key turned
  • FishermansFriend
  • Aug 9, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
16
Views
461
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 30, 2026
General karthief
Drivetrain Broken clutch cable- what it looks like
  • JulianR
  • Aug 6, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
24
Views
570
Fox 5.0 Mustang Tech Aug 10, 2026
gkomo
C
86 Mustang wiper control module bypass
  • csracing
  • Jun 12, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
689
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 19, 2025
sparkylawdog
S
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?