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

car wont run when its warm

  • Thread starter Thread starter mys102002
  • Start date Start date Jun 12, 2005
M

mys102002

New Member
Apr 30, 2005
8
0
0
new kensington,pa
Jun 12, 2005
#1
  • Jun 12, 2005
  • #1
i own an 88 lx 5.0 . the car runs fine when its been cold ,even when run through out the day once its warm it seems to run ok ,but a bit sluggish, then all of a sudden its like its chokin or starvin for fuel then just shuts off .once you turn the key off & leave it sit a few minutes it will start and run maybe a block or two then quit.any suggestions,you can hear the fuel pump run the whole time also . any help much appreciated
 

rangerdoc

New Member
Jun 10, 2005
8
0
0
Jun 12, 2005
#2
  • Jun 12, 2005
  • #2
Have you done any mods and fuel injected? Check to see if your fuel lines are running against any hot parts where the fuel may be getting too hot and becoming vaporized. If you're still stock, then it shouldn't be that. I'm sure someone else has some better ideas.
 
M

mys102002

New Member
Apr 30, 2005
8
0
0
new kensington,pa
Jun 12, 2005
#3
  • Jun 12, 2005
  • #3
i just bought the car and the motor has been built from new crank to bigger cams and injectors but i wonder about the fuel lines because the run next to the exhaust
 
P

PurpleStripes

New Member
Jun 8, 2005
10
0
0
Jun 12, 2005
#4
  • Jun 12, 2005
  • #4
When it fails, have someone check to see if the ignition is firing while you turn it over. Sounds like a bad ignition module to me. Common on Fords and is usually affected by heat.
 
M

mys102002

New Member
Apr 30, 2005
8
0
0
new kensington,pa
Jun 12, 2005
#5
  • Jun 12, 2005
  • #5
just put a brand new ig module on the car today to try to correctthe prob but didnt work, your suggestions are greatly appreciated ,do you think possibly computer
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Jun 12, 2005
#6
  • Jun 12, 2005
  • #6
PurpleStripes said:
When it fails, have someone check to see if the ignition is firing while you turn it over.
Click to expand...
Thank you.

One can lose a lot of money tossing parts at a problem rather than diagnosing it and buying the part that is needed.

Follow this advice and post back. Also Jrichker has some info for cars that wont start - you would have to pick and choose which info to follow, but it might help you.
Good luck.
 
You must log in or register to reply here.

Similar threads

S
92 5.0 almost starts
  • Steverino
  • Sep 23, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
5
Views
265
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 25, 2026
General karthief
S
Fuel ‘88 GT Runs Rich Cold — Fixes Itself When I Unplug Sensors (ECT, MAF, O2, etc.)
  • Sufarry
  • Nov 6, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
1K
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
C
98 gt fuel pressure issues
  • chasecollier1984
  • Jun 2, 2026
  • SN95 4.6L Mustang Tech
Replies
0
Views
176
SN95 4.6L Mustang Tech Jun 2, 2026
chasecollier1984
C
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
661
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 30, 2026
General karthief
8
Engine Rough idle and aggressive sputtering when accelerating
  • 88vertible
  • Aug 13, 2025
  • Fox 5.0 Mustang Tech
Replies
4
Views
1K
Fox 5.0 Mustang Tech Dec 13, 2025
Jarhead67
J
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?