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Puzzled w fuel pressure!!

  • Thread starter Thread starter boxcarracer89
  • Start date Start date Jun 28, 2010
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boxcarracer89

Member
Mar 26, 2009
153
0
16
I live in Roswell NM
Jun 28, 2010
#1
  • Jun 28, 2010
  • #1
Alright, I know i asked about this before and I did what u guys thought it was, but no luck!! my fuel pressure is all the way at 70 psi!! everyone has told me I have a pinched return line so i swaped my fuel lines and i had exactly the same problem!! I took it to get dynoed and their computer said I was running really rich! Any ideas would be greatly appreciated, I have a brand new adj fuel pressure reg frm aeromotive!! and I even put it on my other mustang to make sure it works. I am reading the psi off a gauge on the rail and i also moved it to my other mustang to make sure it worked as well! I have an in tank bbk fuel pump 255lph. My mods are an eagle 347 stroker short block, tfs heads, holley intake, 30lb injectors, msd distributor. I would really appreciate it if u could help me thank you!!
 
H

Haus

Member
Jul 20, 2005
408
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Jun 28, 2010
#2
  • Jun 28, 2010
  • #2
So you cant adjust the FPR to a lower PSI??
 

Kdubslugga

Active Member
Jun 7, 2003
1,515
3
38
Akron, OH
Jun 28, 2010
#3
  • Jun 28, 2010
  • #3
Only thing that would cause that high of a fuel pressure. Fuel Pump, Fuel Lines, Fuel Regualtor. Rule out injectors because even if 1 was bad it would affect pressure. Did you replace fuel lines from rails to tank?
 
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boxcarracer89

Member
Mar 26, 2009
153
0
16
I live in Roswell NM
Jun 29, 2010
#4
  • Jun 29, 2010
  • #4
I replaced the whole line except the fuel rail! and yeah I adjusted the regulator all the way up and down and no change at all!!??
 

liljoe07

5 Year Member
Feb 18, 2009
1,622
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Cartersville,Ga
Jun 30, 2010
#5
  • Jun 30, 2010
  • #5
Pinched return line.
 

jrichker

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Dublin GA
Jun 30, 2010
#6
  • Jun 30, 2010
  • #6
liljoe07 said:
Pinched return line.
Click to expand...

That makes two of us with the same opinion...
 
B

boxcarracer89

Member
Mar 26, 2009
153
0
16
I live in Roswell NM
Jul 1, 2010
#7
  • Jul 1, 2010
  • #7
Alright, thanks guys I will double check everything!
 

Strype

Cuthbert catcher
Founding Member
May 11, 1999
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Huntsvegas, AL
Jul 1, 2010
#8
  • Jul 1, 2010
  • #8
Might want to check that fuel rail as well where it hits the return line...
 

Cobra912

Active Member
May 1, 2005
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Wish I was anywhere but here
Jul 1, 2010
#9
  • Jul 1, 2010
  • #9
I had the same problem. mine was pinched where the flexible lines go to the hard lines. i couldn't see it because the hose was protected by some type of covering or wire loom
 
B

boxcarracer89

Member
Mar 26, 2009
153
0
16
I live in Roswell NM
Jul 1, 2010
#10
  • Jul 1, 2010
  • #10
Thanks guys!! Ive just been so frustrated and annoyed w this!! Its been running like crap! I will make sure to check all this! Ill be sure to post if I can figure it out.
 
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