• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-

Fuel Pump causing stalling?

  • Thread starter Thread starter trlps_
  • Start date Start date May 2, 2020

trlps_

New Member
Feb 25, 2020
26
0
1
Houston
May 2, 2020
#1
  • May 2, 2020
  • #1
Bit weird but I did notice this problem that started to happen, when the fuel pump is on and operating properly, the car starts and idles fine but a little rough for a few seconds but then will cut off almost everytime I start the car. I tapped the inertia switch in the back and unplugged anything that would cause the fuel pump to turn on at all and noticed that it started fine and idled fine and steady until it ran through all the fuel in the system. I also tried letting it idle with the fuel pump off a couple of times and turning the fuel pump back on while it’s idling and as soon as it turns on, same thing the car cuts off. Does anybody have any idea as to what this could be? I did change the fuel pump assembly already but it was having this issue before and it still is continuing to do the same thing, cant seem to figure out what it is.
 
Last edited: May 3, 2020

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
May 3, 2020
#2
  • May 3, 2020
  • #2
Possibly the Idle Air Control valve.
 

trlps_

New Member
Feb 25, 2020
26
0
1
Houston
May 6, 2020
#3
  • May 6, 2020
  • #3
COramprat said:
Possibly the Idle Air Control valve.
Click to expand...
im leaning on it but not 100% sure, I know it gave me some problems before like idle surge and when driving in gear the rpms would go pretty high and stay there even when coming out of gear, I cleaned it with carb cleaner and nothing changed still was doing the same problem, the fuel pump problem is throwing me off the most though but hopefully it is the IAC
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
May 7, 2020
#4
  • May 7, 2020
  • #4
Do you have a check engine light on?
 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
May 8, 2020
#5
  • May 8, 2020
  • #5
Just wondering. What model year Mustang are we dealing with anyway?

Troubleshoot IAC idle problems 1996-2004

Troubleshoot IAC idle problems 1996-2004

Back to the basics. Check for blown fuses. Especially fuse F2.2 and F2.8 in the Central Junction Box (CJB 1999-2004 MY). Confirm key on power using a known good ground. 1999-2004 MY fuse panel schedule...
www.stangnet.com

What about the alternator and battery?

Howto perform charging system voltage drop test

Howto perform charging system voltage drop test

To anyone else reading any of my posts I usually include the line: Today's cars simply will not run right without a strong battery and charging system! Cut corners here at your own risk I'm a big believer in starting with the basics. As such I...
www.stangnet.com

Is the fuel rail pressure sensor intake vacuum reference line connected and leak free?
 
You must log in or register to reply here.

Similar threads

M
01 mustang 3.8 fuel pressure issue
  • Mhaley2006
  • May 29, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
4
Views
257
1996 - 2004 SN95 Mustang -General/Talk- Aug 9, 2026
JohnKay
J
S
FUEL PUMP ALWAYS ON
  • Scwhitten
  • Jun 6, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • 2
Replies
27
Views
554
1996 - 2004 SN95 Mustang -General/Talk- Jul 4, 2026
manicmechanic007
M
3.8 start problems. New edge 2003
  • Mayk.i.
  • Oct 2, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
2
Views
188
1996 - 2004 SN95 Mustang -General/Talk- Oct 3, 2025
manicmechanic007
Fox Fuel Pump Issues After Replacement/Upgrade
  • Ryu
  • Jun 23, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
23
Views
715
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 5, 2026
Ryu
F
2004 Mustang GT – Fuel Pump Not Priming
  • Fayio
  • Apr 22, 2026
  • SN95 4.6L Mustang Tech
Replies
7
Views
362
SN95 4.6L Mustang Tech Apr 27, 2026
n0v8or
N
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
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?