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

Fuel pump install questions!

  • Thread starter Thread starter NIKwoaC
  • Start date Start date Apr 21, 2011

NIKwoaC

中國製造
15 Year Member
Oct 31, 2006
5,525
943
214
Chengdu Province
Apr 21, 2011
#1
  • Apr 21, 2011
  • #1
Hey guys. Dropped the tank and yanked out the factory pump to install a new Walbro 255lph unit. The picture of the new pump and accessories can be seen in the image below.

The scenario is this: The new pump comes with a plug-in style electrical harness (as you can see in the pic). The original pump in the car had just two male prongs sticking out of it, and the factory wiring was attached to those with uninsulated female slip-on wire terminals.

I called Summit (who I bought it from), and their tech guy said to splice in the new plug harness and use that with the pump. The pump kit came with two crimp connectors to do just that (you can see them in the pic).

My question is this: Are the crimp on connectors sufficient? Bear in mind, this is the in-tank wiring, so it's always exposed to gas. The tech guy said I could crimp it, or if I wanted to, I could solder it. The problem is, I'm too nervous to bring a hot soldering gun anywhere near those parts that have been soaking in gas for the last 25 years. Also, that would require heat-shrink tubing, and I don't know how that would hold up under constant exposure to gasoline (especially today's stuff with ethanol in it).

Has anyone else ran into this? I figure somebody HAS to have been through this, it's such a common upgrade and such a common pump.

 

LarsD

Founding Member
Jul 2, 2002
2,680
119
123
Texas
Apr 21, 2011
#2
  • Apr 21, 2011
  • #2
I just went through this a month or so ago. I got some fuel resistant fuel tubing from McMaster Carr, and I double shrank it. Don't worry about soldering it it won't catch fire, I even used a lighter to shrink the tubing (not close to the tank!). Lemme see if I can find you a link to my thread.
 

LarsD

Founding Member
Jul 2, 2002
2,680
119
123
Texas
Apr 21, 2011
#3
  • Apr 21, 2011
  • #3
Here we go:

http://www.stangnet.com/mustang-forums/834784-fuel-resistant-heat-shrink-tubing.html

As a side note, anybody know what the little silver thing is on the outlet of the fuel pump is in the pic? Looks kinda like a restrictor of some sort. I found it stuck in the rubber cap that came off the pump after I installed it.
 

NIKwoaC

中國製造
15 Year Member
Oct 31, 2006
5,525
943
214
Chengdu Province
Apr 21, 2011
#4
  • Apr 21, 2011
  • #4
LarsD said:
I just went through this a month or so ago. I got some fuel resistant fuel tubing from McMaster Carr, and I double shrank it. Don't worry about soldering it it won't catch fire, I even used a lighter to shrink the tubing (not close to the tank!). Lemme see if I can find you a link to my thread.
Click to expand...

Did you crimp it or solder it? Honestly, if I can get away with crimping it, I'm not terribly concerned with heat shrinking it. Gas is non-conductive, so as long as I don't have any bare wire flopping around, I won't lose any sleep. The insulation on the crimp connectors will be enough to ensure I don't have any shorts.

LarsD said:
Here we go:

http://www.stangnet.com/mustang-forums/834784-fuel-resistant-heat-shrink-tubing.html

As a side note, anybody know what the little silver thing is on the outlet of the fuel pump is in the pic? Looks kinda like a restrictor of some sort. I found it stuck in the rubber cap that came off the pump after I installed it.
Click to expand...

That silver thing was fixed to my pump, it stayed on even after pushing and pulling off the fuel pump line 3 or 4 times.
 

LarsD

Founding Member
Jul 2, 2002
2,680
119
123
Texas
Apr 21, 2011
#5
  • Apr 21, 2011
  • #5
NikwoaC said:
Did you crimp it or solder it? Honestly, if I can get away with crimping it, I'm not terribly concerned with heat shrinking it. Gas is non-conductive, so as long as I don't have any bare wire flopping around, I won't lose any sleep. The insulation on the crimp connectors will be enough to ensure I don't have any shorts.



That silver thing was fixed to my pump, it stayed on even after pushing and pulling off the fuel pump line 3 or 4 times.
Click to expand...

I soldered it.
 

NIKwoaC

中國製造
15 Year Member
Oct 31, 2006
5,525
943
214
Chengdu Province
Apr 21, 2011
#6
  • Apr 21, 2011
  • #6
LarsD said:
I soldered it.
Click to expand...

Damn, haha. I hate soldering.
 

stykthyn

I want to measure mine. It doesn't look that tall.
15 Year Member
Jul 6, 2006
5,232
2,652
223
gainesville
Apr 21, 2011
#7
  • Apr 21, 2011
  • #7
I did this on another vehicle. Same pump. I crimped it. Was still running strong when I sold it a couple years later.
 

NIKwoaC

中國製造
15 Year Member
Oct 31, 2006
5,525
943
214
Chengdu Province
Apr 21, 2011
#8
  • Apr 21, 2011
  • #8
stykthyn said:
I did this on another vehicle. Same pump. I crimped it. Was still running strong when I sold it a couple years later.
Click to expand...

:
 

stykthyn

I want to measure mine. It doesn't look that tall.
15 Year Member
Jul 6, 2006
5,232
2,652
223
gainesville
Apr 21, 2011
#9
  • Apr 21, 2011
  • #9
Donchoo go makin faces at me hippy
 

NIKwoaC

中國製造
15 Year Member
Oct 31, 2006
5,525
943
214
Chengdu Province
Apr 21, 2011
#10
  • Apr 21, 2011
  • #10
stykthyn said:
Donchoo go makin faces at me hippy
Click to expand...

Haha, that's my "hmm, if it worked for him..." face.

What if I made this face at you?
 

ID89GT

10 Year Member
May 26, 2008
1,659
18
49
Spokane Valley, WA
Apr 21, 2011
#11
  • Apr 21, 2011
  • #11
I crimped mine, had no problems at all.
 

stykthyn

I want to measure mine. It doesn't look that tall.
15 Year Member
Jul 6, 2006
5,232
2,652
223
gainesville
Apr 21, 2011
#12
  • Apr 21, 2011
  • #12
Ask why you aren't with ovs
 
You must log in or register to reply here.

Similar threads

1
Electrical Headlight harness trouble
  • 1985fox
  • Apr 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
195
Fox 5.0 Mustang Tech Apr 17, 2026
AeroCoupe
D
Fox 88 foxbody no power to red and black wire at fuel pump relay
  • drod88
  • Dec 1, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
7
Views
306
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Dec 2, 2025
Mcmahst
New fuel pump relay
  • Scrapla347
  • Nov 3, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
12
Views
801
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Nov 8, 2025
Scrapla347
1
Electrical 1985 mustang gt Led conversion trouble
  • 1985fox
  • Jan 5, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
545
Fox 5.0 Mustang Tech Jan 15, 2026
1985fox
1
B
water pump installation questions
  • B0udreaux
  • Feb 5, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
38
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 28, 2026
General karthief
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?