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

Noobs: TFI Module Advice

  • Thread starter Thread starter nito88stang
  • Start date Start date Dec 4, 2004

nito88stang

Founding Member
May 23, 2002
2,012
0
46
Fullerton, California
Dec 4, 2004
#1
  • Dec 4, 2004
  • #1
If you own a 5.0 mustang long enough your TFI module will fail sooner or later and leave you stranded on the side of the road. So here are a few things to make your life easier.

Carry a spare TFI module in your glovebox or toolbox (get one from a junkyard or get a new one if u can swing the cash)

Replace the stock bolts before hand. You have to use a 7/32 deep socket to even get to them, and unless you always have one with you at all times they are in there for good. What i suggest is to take those out and put in a bolt that can be removed with a screwdriver to make it easier on you while you try to replace on the side of the road.

Make sure to use heatsink jelly when you put the tfi module on or it will fry on you. YOu can put one without just to get your butt home, but do put the heatsink on when you get a chance.

 

bluevenom867

I will have images of molesting stuffed animals in
Dec 15, 2003
1,704
1
0
St.Petersburg,FL
Dec 4, 2004
#2
  • Dec 4, 2004
  • #2

Mine never when't bad
 

stang22

Active Member
Jan 29, 2003
1,318
7
38
Washington, D.C.
Dec 4, 2004
#3
  • Dec 4, 2004
  • #3
Mine never left me stranded on the side of the road, it only missed at higher RPM's. Just my 2 cents...

Tim
 
S

SYLENTBUTVYLENT

Member
Apr 5, 2003
136
0
17
Chicago
Dec 4, 2004
#4
  • Dec 4, 2004
  • #4
Performance Distributers, dyna mod. Try it
 

NKau

Founding Member
Dec 15, 2001
1,346
0
37
Jefferson, WI
Dec 4, 2004
#5
  • Dec 4, 2004
  • #5
nito88stang said:
Replace the stock bolts before hand. You have to use a 7/32 deep socket to even get to them, and unless you always have one with you at all times they are in there for good. What i suggest is to take those out and put in a bolt that can be removed with a screwdriver to make it easier on you while you try to replace on the side of the road.
Click to expand...


Parts stores carry what is called a "tfi module removal tool"; much easier to remove module with one of those. They cost $5 and are no bigger than a roll of film; I keep a spare tfi module and removal tool in my glovebox after I had one fail on my old '89; luckily it only left me stranded at home.
 

_jb_

New Member
Mar 4, 2004
808
0
0
Michigan, Berrien County
Dec 4, 2004
#6
  • Dec 4, 2004
  • #6
What does TFI stand for? Throttle fuel injection?
 

OL' WHITEY

New Member
Jan 28, 2004
273
0
0
Weddington, NC
Dec 4, 2004
#7
  • Dec 4, 2004
  • #7
Thick film ignition
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Dec 4, 2004
#8
  • Dec 4, 2004
  • #8
what is heatsink jelly? is that like dielectrical grease? i thought one was to use the latter on the mating surfaces.

this is a good idea, and there are write ups all over the internet on how to have spare ones or even extra ones (think: ol'd british cars that required one fuel pump but had 2 for when one failed. LOL).
 
You must log in or register to reply here.

Similar threads

Resolved 1989 Mustang GT no spark, no trigger pump relay
  • Nine Finger Wrenching
  • Nov 26, 2023
  • Fox 5.0 Mustang Tech
Replies
14
Views
4K
Fox 5.0 Mustang Tech Nov 30, 2023
Nine Finger Wrenching
Engine Information that is Needed When You Post a "Car is not Running" or "Car is Running Poorly" Thread
  • AeroCoupe
  • Apr 28, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
29
Views
1K
Fox 5.0 Mustang Tech May 4, 2025
Bullitt347
J
Help Figuring Motor Choice(Possible future turbo)?
  • jaygee15
  • Dec 14, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
13
Views
668
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 3, 2026
Jarhead67
J
Progress Thread Progress Thread- From6to8's 95 GT/Saleen Supercharged 331 install
  • from6to8
  • Mar 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
24
Views
968
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 6, 2026
from6to8
0
V6 to V8 Swap info
  • 02_2v_Curtis
  • Jan 11, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
776
1996 - 2004 SN95 Mustang -General/Talk- Jan 11, 2026
02_2v_Curtis
0
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?