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

Help with fuel line to rail connection

  • Thread starter Thread starter 68converted
  • Start date Start date Apr 24, 2008

68converted

Member
Nov 19, 2003
772
0
16
Colorado
Apr 24, 2008
#1
  • Apr 24, 2008
  • #1
Hi Guys,
I am at the last stage and I cannot remember which line to connect were? So lets eliminate one. LOL Which fuel rail line is fed from the fuel pump?

Thanks for the help, I am hoping to have this 3 1/2 year project started on Saturday.
 

ATISTANG

Member
Apr 15, 2006
104
0
16
Apr 24, 2008
#2
  • Apr 24, 2008
  • #2
the one that sprays fuel when you turn the key on
 

68converted

Member
Nov 19, 2003
772
0
16
Colorado
Apr 24, 2008
#3
  • Apr 24, 2008
  • #3
ATISTANG said:
the one that sprays fuel when you turn the key on
Click to expand...

LOL yeah real funny.

No seriously, I got the engine in pieces, and it is a brand new fuel system. Two lines come off the fuel rail with quick connects (OEM). Which one should I connect from the fuel pump?
 

mustangfan1990

New Member
Jul 17, 2005
505
1
0
Lenoir, North Carolina
Apr 25, 2008
#4
  • Apr 25, 2008
  • #4
I think the quick connect are different sizes arent they. They may not be. I never had a problem with getting them backwards
 

68converted

Member
Nov 19, 2003
772
0
16
Colorado
Apr 25, 2008
#5
  • Apr 25, 2008
  • #5
mustangfan1990 said:
I think the quick connect are different sizes arent they. They may not be. I never had a problem with getting them backwards
Click to expand...

Yup, they are diff. But of course, I am starting from scratch so no help there.
 

ATISTANG

Member
Apr 15, 2006
104
0
16
Apr 25, 2008
#6
  • Apr 25, 2008
  • #6
68converted said:
LOL yeah real funny.
Click to expand...

i was serious, i thought you had them connected at the fuel pump already
 

68converted

Member
Nov 19, 2003
772
0
16
Colorado
Apr 25, 2008
#7
  • Apr 25, 2008
  • #7
ATISTANG said:
i was serious, i thought you had them connected at the fuel pump already
Click to expand...

Oh sorry, I know which is the supply and return from the tank and pump, just don't know which to connect where on the fuel rail.

Does the fuel pressure regulator, regulate the pressure going to the rail or is does it hold back the pressure before dumping to the return.

Does that make sense? I can't find a line routing diagram anywhere? Arrrgggg
 

ATISTANG

Member
Apr 15, 2006
104
0
16
Apr 25, 2008
#8
  • Apr 25, 2008
  • #8
everything before the regulator is feed (pressurized) everything after is return (little to no pressure)

so basically the regulator just holds fuel back until the pressure gets to a certain point then starts bleeding it into the return line, this way all the injectors have a constant pressure at the inlet
 

68converted

Member
Nov 19, 2003
772
0
16
Colorado
Apr 25, 2008
#9
  • Apr 25, 2008
  • #9
ATISTANG said:
everything before the regulator is feed (pressurized) everything after is return (little to no pressure)

so basically the regulator just holds fuel back until the pressure gets to a certain point then starts bleeding it into the return line, this way all the injectors have a constant pressure at the inlet
Click to expand...

Thank you for the help. I finally found a cutaway graphic of the OEM regulator, that let me determine where to connect in. Hopefully I can start this thing on Saturday.
 
You must log in or register to reply here.

Similar threads

D
Fuel Erratic Fuel Pressure 1985 GT
  • DienstXIV
  • Jan 14, 2026
  • Fox 5.0 Mustang Tech
Replies
16
Views
656
Fox 5.0 Mustang Tech Jan 16, 2026
AeroCoupe
C
03 Cobra Low Fuel Pressure
  • CTsnake_03
  • Mar 17, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
5
Views
245
1996 - 2004 SN95 Mustang -General/Talk- Mar 24, 2026
CTsnake_03
C
D
Fuel 1985 GT Fuel Line Diagram
  • DienstXIV
  • Apr 17, 2025
  • Fox 5.0 Mustang Tech
Replies
8
Views
1K
Fox 5.0 Mustang Tech Jul 12, 2025
DienstXIV
D
Fuel 87 5.0 Fuel rail lines
  • Mcmahst
  • Jan 21, 2025
  • Fox 5.0 Mustang Tech
Replies
15
Views
1K
Fox 5.0 Mustang Tech Feb 11, 2025
Mcmahst
L
1997 V6 Starting issue
  • leanzik04
  • Mar 20, 2026
  • SN95 V6 Mustang Tech
Replies
3
Views
237
SN95 V6 Mustang Tech Mar 20, 2026
Noobz347
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?