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

swapping relays

  • Thread starter Thread starter JD1964
  • Start date Start date Oct 27, 2019
Prev
  • 1
  • 2
First Prev 2 of 2

Blown88GT

Founding Member
Nov 13, 1999
2,283
524
164
Palm Beach Gardens, FL
Nov 17, 2019
#21
  • Nov 17, 2019
  • #21
Want to know if it's steel? A magnet will stick to steel.
Looks like steel to me.
 
A

Apsolo

New Member
Dec 27, 2019
3
0
1
Texas
Dec 28, 2019
#22
  • Dec 28, 2019
  • #22
John Dirks Jr said:
To elaborate, it's a startup issue. If its cold and first start of the day, it will start up. I can turn the key to on position and hear the pump prime up the line. Crank it and it will start and run normally. Let it run long enough to warm up then turn it off. Wait a few mins, turn key on and don't hear pump prime at all, wont start. I dont smell any gas like you would if it were flooding. If I wait for it to cool back down I can turn the key on and hear the pump prime and it will start.

Cold start > pump primes > starts..... Warm start > no pump prime > no start

Any ideas?
Click to expand...
John Dirks Jr said:
To elaborate, it's a startup issue. If its cold and first start of the day, it will start up. I can turn the key to on position and hear the pump prime up the line. Crank it and it will start and run normally. Let it run long enough to warm up then turn it off. Wait a few mins, turn key on and don't hear pump prime at all, wont start. I dont smell any gas like you would if it were flooding. If I wait for it to cool back down I can turn the key on and hear the pump prime and it will start.

Cold start > pump primes > starts..... Warm start > no pump prime > no start

Any ideas?
Click to expand...
John Dirks Jr said:
To elaborate, it's a startup issue. If its cold and first start of the day, it will start up. I can turn the key to on position and hear the pump prime up the line. Crank it and it will start and run normally. Let it run long enough to warm up then turn it off. Wait a few mins, turn key on and don't hear pump prime at all, wont start. I dont smell any gas like you would if it were flooding. If I wait for it to cool back down I can turn the key on and hear the pump prime and it will start.

Cold start > pump primes > starts..... Warm start > no pump prime > no start

Any ideas?
Click to expand...
Did you ever find the problem, im having a very similar problem with my 2010 mustang
 

JD1964

there is enough sticking out to grab on to
15 Year Member
Jun 28, 2013
3,520
1,593
194
Maryland
Dec 28, 2019
#23
  • Dec 28, 2019
  • #23
I have a faulty ECU
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
28,094
10,710
213
polk county florida
Dec 28, 2019
#24
  • Dec 28, 2019
  • #24
Apsolo said:
Did you ever find the problem, im having a very similar problem with my 2010 mustang
Click to expand...
the problem will likely be different on a 2010 model.
the computer system on a fox is antiquated compared to the 2010 computer. Post your problem in the S197 forums tech section. Be specific when describing your symptoms.
 
Reactions: Apsolo
A

Apsolo

New Member
Dec 27, 2019
3
0
1
Texas
Jan 2, 2020
#25
  • Jan 2, 2020
  • #25
General karthief said:
the problem will likely be different on a 2010 model.
the computer system on a fox is antiquated compared to the 2010 computer. Post your problem in the S197 forums tech section. Be specific when describing your symptoms.
Click to expand...
Thank you
 
Prev
  • 1
  • 2
First Prev 2 of 2
You must log in or register to reply here.

Similar threads

U
No fuel pump relay in harness
  • Uli661
  • May 18, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
4
Views
209
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 1, 2026
Uli661
U
S
92 5.0 almost starts
  • Steverino
  • Sep 23, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
5
Views
176
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 25, 2026
General karthief
W
Need help! 1989 mustang
  • wickedzach487
  • Mar 3, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
6
Views
300
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Mar 4, 2026
AeroCoupe
New fuel pump relay
  • Scrapla347
  • Nov 3, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
12
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Nov 8, 2025
Scrapla347
S
Help needed - Cranks, no Start
  • sleeping93coupe
  • Nov 30, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
4
Views
372
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Nov 30, 2025
AeroCoupe
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -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?