Puzzled w fuel pressure!!

[boxcarracer89]

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!!

 

[Haus]

So you cant adjust the FPR to a lower PSI??

 

[Kdubslugga]

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?

 

[boxcarracer89]

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]

Pinched return line.

 

[jrichker]

Pinched return line.

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

 

[boxcarracer89]

Alright, thanks guys I will double check everything!

 

[Strype]

Might want to check that fuel rail as well where it hits the return line...

 

[Cobra912]

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

 

[boxcarracer89]

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.