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

car runs bad for few minutes after every shut off

  • Thread starter Thread starter mr5o
  • Start date Start date May 16, 2005

mr5o

Founding Member
Jan 28, 2001
931
0
16
Ontario, Canada
May 16, 2005
#1
  • May 16, 2005
  • #1
every time i turn on my car it seems to run rough for a few minutes then starts to work things out ...even if its runing mint and i shut it off for a sec then start again it runs rough ...any ideas ? mod below could it be a bad A9L
 
J

JB66

New Member
Aug 21, 2004
565
1
0
New York
May 16, 2005
#2
  • May 16, 2005
  • #2
Sounds like the memory retention power wire for the ECM is dead.
 

bgjohnson

Founding Member
Sep 1, 2002
963
0
16
johnston,iowa
May 16, 2005
#3
  • May 16, 2005
  • #3
JB66 said:
Sounds like the memory retention power wire for the ECM is dead.
Click to expand...

what do you mean by this? and where is it located?
 
J

JB66

New Member
Aug 21, 2004
565
1
0
New York
May 16, 2005
#4
  • May 16, 2005
  • #4
What it means is that the computer has to re-learn the engine every time you start it. I don't have my 89 book handy, but the 91 book has a solid yellow wire that runs off the battery side of the starter solenoid through a 20ga DK Blue fuse link that goes to the ECM power relay and then splices off directly to the ECM computer. Check for power at pin #1 of your computer with the ignition OFF.
 

mr5o

Founding Member
Jan 28, 2001
931
0
16
Ontario, Canada
May 17, 2005
#5
  • May 17, 2005
  • #5
any other thought i'll make sure i check that
 
You must log in or register to reply here.

Similar threads

Engine Coolant boiling in hose?
  • Teen'93stang5.0
  • Jun 3, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
183
Fox 5.0 Mustang Tech Jun 8, 2026
Mustang5L5
E
2007 GT Stalls when lights or a/c turned on
  • ejscarfo
  • Jun 22, 2026
  • 2005 - 2009 Specific Tech
Replies
2
Views
144
2005 - 2009 Specific Tech Jun 29, 2026
ejscarfo
E
Electrical AC relay location on 86?
  • TIGGER
  • Aug 26, 2025
  • Fox 5.0 Mustang Tech
Replies
1
Views
198
Fox 5.0 Mustang Tech Aug 26, 2025
AeroCoupe
B
Electrical Why does my fox body keep frying eecs
  • brandyn200
  • Jun 20, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
277
Fox 5.0 Mustang Tech Jun 25, 2026
AeroCoupe
F
2004 Mustang GT – Fuel Pump Not Priming
  • Fayio
  • Apr 22, 2026
  • SN95 4.6L Mustang Tech
Replies
7
Views
318
SN95 4.6L Mustang Tech Apr 27, 2026
n0v8or
N
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?