Fuel Lines blue or gray

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May 17, 2004 | 08:28 AM

doc7f

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Fuel Lines blue or gray

Does anyone know which fuel line goes to the fuel injection, theres a blue one and gray one, i just can't figure out which one is for the return fumes to the tank.

May 18, 2004 | 01:04 AM

Racerguy

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Both lines have fuel pressure in them. The vapor line is the one that runs down the outside of the frame, behind the left front wheel.

May 19, 2004 | 12:07 AM

doc7f

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I don't know if i'm seeing things, but I see three lines running alongside the frame, i do see the one that runs up by the front left tire, but the other 2 run parallel as far as i can see. I'm looking for the line that delievers the fuel to the fuel injecters. Thanks

May 19, 2004 | 12:28 AM

Racerguy

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Offhand I dont know which is which. The fuel lines run up over the top of the transmission, up to the engine. If you find the fuel pressure regulator on the fuel rail near the injectors the return line is the one line that comes out of the side of the regulator. The other line that goes into the fuel rail is the supply line.
Can I ask why you need to know which is which?

May 19, 2004 | 09:57 AM

doc7f

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Its kinda a funny story, i got one of those fuel magnets through a club and i have to write a review on it, so i put it on a hose that says fuel on the side thinking that was it, and my mechanic told me the other day it was on a vapor hose not the gas hose, so i'm trying to find the right one lol, i'll try it on one of those if the rain here ever holds out, every time i get under my truck it starts to rain lol

May 19, 2004 | 10:28 AM

Racerguy

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Putting the magnets on the vapor hose or heck, even on a brake line will do as much good

May 19, 2004 | 11:01 AM

doc7f

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Its like a tootsie roll pop, the world will never know...but i'm gonna try, and i'll let you know

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May 20, 2004 | 12:53 AM

Racerguy

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Thanks Fordtech

May 20, 2004 | 02:48 AM

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doc7f

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thanks alot

Oct 8, 2019 | 07:15 PM

#11

Casey87f150i6t-18

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Old thread I know, but does anyone know where to get those replacements? I cant seem to find them anywhere

May 6, 2020 | 09:25 AM

#12

1993fordf250_5.8

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was wondering the same!

Oct 23, 2023 | 06:54 PM

#13

pvohnoutka

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2002 f350 with 5.4L can anyone give me a part # for the blue supply fuel line running from the fuel filter to the fuel rack. Anyone know where it is available other than the Ford dealer. Thanks