• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

What are your thoughts on nylon fuel line

holyford86

Well-Known Member
RBV's on Boost
GMRS Radio License
Joined
Aug 6, 2007
Messages
2,074
Reaction score
261
Points
83
Age
36
Location
Plattsburgh, NY
Vehicle Year
many
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
7
Tire Size
33x12.50R15
Did a 4.0 swap about 10 years ago and plumbed everything with rubber fuel injection hose, I've been thinking about replacing it with OE style nylon line and push connect fittings as I can borrow the tool to properly assemble the lines. I feel like it's a better choice than using rubber lined AN hose, and my pockets aren't deep enough to justify the better, ethanol resistant stuff and all the adapter fittings I'd need to make it work right. Thoughts?
 


dvdswan

Well-Known Member
U.S. Military - Veteran
Joined
Feb 11, 2021
Messages
2,278
Reaction score
1,894
Points
113
Location
Seattle, WA
Vehicle Year
1991
Make / Model
Ranger XLT 2WD
Engine Type
3.0 V6
Transmission
Automatic
2WD / 4WD
2WD
My credo
Keep your mind like an umbrella, it only works if its open... Continually learning.
Do you still have the steel lines or did you replace those with rubber as well? When I installed my 5.3L I used 3/8" and 5/16" steel lines along the frame, then areas where a connection was needed I used the AN fittings and a 1' long braided line. It's hard to see but on the top of the driver frame rail is a single line that comes from between the dual tanks.

346.jpg
 

holyford86

Well-Known Member
RBV's on Boost
GMRS Radio License
Joined
Aug 6, 2007
Messages
2,074
Reaction score
261
Points
83
Age
36
Location
Plattsburgh, NY
Vehicle Year
many
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
7
Tire Size
33x12.50R15
Do you still have the steel lines or did you replace those with rubber as well? When I installed my 5.3L I used 3/8" and 5/16" steel lines along the frame, then areas where a connection was needed I used the AN fittings and a 1' long braided line. It's hard to see but on the top of the driver frame rail is a single line that comes from between the dual tanks.
Yes, I used the lines from the donor as far as the braided lines from the fuel rail and the stainless lines between those and the fuel filter, but needed to attach them together with rubber lines because the flexible portions were damaged and living in the rust belt makes it difficult to find any that aren't trash. I also deleted the dual pump system and the canister found on the first gens and went with a high pressure in tank pump also, thereby making the factory nylon plumbing useless also. I would like to stay away from using steel line to replace the rubber because of the possibility of rusting and don't feel like dealing with that in a few years either, haha.
 

Sharky

Active Member
Joined
Sep 26, 2020
Messages
142
Reaction score
83
Points
28
Location
PA
Vehicle Year
2020
Make / Model
Ford Ranger
Engine Type
2.3 EcoBoost
Transmission
Automatic
2WD / 4WD
4WD
make sure to use up to date fuel injection fuel hose, it wont rot from the ethanol & other additives in todays fuel.
 

Shran

Junk Collector
Forum Moderator
Supporting Member
Article Contributor
V8 Engine Swap
Solid Axle Swap
Joined
Mar 4, 2008
Messages
7,599
Reaction score
3,041
Points
113
Location
Rapid City SD
Engine Type
V8
Engine Size
5.0
I would be awful tempted to use stainless brake/fuel tubing or normal steel brake line as a close second option. I'm not a huge fan of long runs of rubber hose and nylon is OK but not as easy to repair, IMO. I have a bunch of rubber line on three of my trucks and it really bothers me, it was supposed to be a quick and dirty fix and I never ended up replacing it.
 

dvdswan

Well-Known Member
U.S. Military - Veteran
Joined
Feb 11, 2021
Messages
2,278
Reaction score
1,894
Points
113
Location
Seattle, WA
Vehicle Year
1991
Make / Model
Ranger XLT 2WD
Engine Type
3.0 V6
Transmission
Automatic
2WD / 4WD
2WD
My credo
Keep your mind like an umbrella, it only works if its open... Continually learning.

Uncle Gump

Forum Staff Member
Forum Moderator
Supporting Member
TRS Event Participant
Joined
Sep 17, 2018
Messages
11,149
Reaction score
9,042
Points
113
Location
Ottawa IL
Vehicle Year
2006/1986
Make / Model
Ranger/BroncoII
Engine Size
4.0L SOHC/2.9L
2WD / 4WD
4WD
My credo
Lead, Follow or get out of my way
I just bought the doorman tool to do nylon.

I guess that says where my head is at with fuel lines.
 

snoranger

Forum Stuff Member
Forum Moderator
Supporting Member
ASE Certified Tech
TRS Event Participant
GMRS Radio License
Joined
Nov 25, 2007
Messages
12,022
Reaction score
11,456
Points
113
Location
Jackson, NJ
Vehicle Year
'79,'94,'02,'20
Make / Model
All Fords
Transmission
Manual
2WD / 4WD
2WD
My credo
I didn't ask for your life story, just answer the question!
Nylon fuel lines will last longer than the frame in the rust belt.
 

mikkelstuff

Active Member
Joined
Mar 26, 2018
Messages
385
Reaction score
136
Points
43
Location
Brighton, CO
Vehicle Year
2002
Make / Model
Ford
Engine Size
3.0L
Transmission
Automatic
I think the nylon or whatever fuel lines are crap. No fuel line should be that difficult to patch or join.

Decent rubber fuel injection hose is readily available. Steel lines are also great.
 

Uncle Gump

Forum Staff Member
Forum Moderator
Supporting Member
TRS Event Participant
Joined
Sep 17, 2018
Messages
11,149
Reaction score
9,042
Points
113
Location
Ottawa IL
Vehicle Year
2006/1986
Make / Model
Ranger/BroncoII
Engine Size
4.0L SOHC/2.9L
2WD / 4WD
4WD
My credo
Lead, Follow or get out of my way
I think the nylon or whatever fuel lines are crap. No fuel line should be that difficult to patch or join.

Decent rubber fuel injection hose is readily available. Steel lines are also great.
My 36 year old Bronco II still has the original nylon lines. How crappy can they be?
 

holyford86

Well-Known Member
RBV's on Boost
GMRS Radio License
Joined
Aug 6, 2007
Messages
2,074
Reaction score
261
Points
83
Age
36
Location
Plattsburgh, NY
Vehicle Year
many
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
7
Tire Size
33x12.50R15
make sure to use up to date fuel injection fuel hose, it wont rot from the ethanol & other additives in todays fuel.
I am currently using the up to date stuff but all rubber hose has a lifespan, and that lifespan is shorter than one may think in some cases, hence the want to stay away from it.

I would be awful tempted to use stainless brake/fuel tubing or normal steel brake line as a close second option. I'm not a huge fan of long runs of rubber hose and nylon is OK but not as easy to repair, IMO. I have a bunch of rubber line on three of my trucks and it really bothers me, it was supposed to be a quick and dirty fix and I never ended up replacing it.
I've considered using stainless tubing but it's a pain to work with in the limited space I have and it would bother me if it looked like crap, if I was doing a new build and had the body off it would be the ideal thing to use though. I'm in the same boat, was supposed to be temporary but has proven to be permanent thus far. The truck isn't anything super special to anyone but me but I'm not a fan of preventable vehicle fires either.

I just bought the doorman tool to do nylon.

I guess that says where my head is at with fuel lines.
My employer has it and I'm free to use the tool whenever, so I guess my head is in a similar place, haha.

Nylon fuel lines will last longer than the frame in the rust belt.
In my case the inverse has proven true, but if I hadn't changed everything they'd still be there. 412k on the frame so far and it's only had two small patches done where the shock mounts live.

My 36 year old Bronco II still has the original nylon lines. How crappy can they be?
My point exactly. I've dealt with rusty trash fuel lines on GM stuff a third of my truck's age many times, I don't like doing it any more than I need to.
 

Uncle Gump

Forum Staff Member
Forum Moderator
Supporting Member
TRS Event Participant
Joined
Sep 17, 2018
Messages
11,149
Reaction score
9,042
Points
113
Location
Ottawa IL
Vehicle Year
2006/1986
Make / Model
Ranger/BroncoII
Engine Size
4.0L SOHC/2.9L
2WD / 4WD
4WD
My credo
Lead, Follow or get out of my way
I just started my fuel line rework. The Dorman tool works with ease. It's warm today and didn't even use a heat gun. Pushed it right together.

20220713_164944.jpg


I did notice on the truck the supply line switches from 3/8 at the tank to 5/16 leaving the canister filter. And the return line does the opposite. So this kit I bought doesn't nhave reducer fittings. So it looks like I'm gonna need two reducers to finish the lines up. They have nothing local so it's back to the internet...
 

Uncle Gump

Forum Staff Member
Forum Moderator
Supporting Member
TRS Event Participant
Joined
Sep 17, 2018
Messages
11,149
Reaction score
9,042
Points
113
Location
Ottawa IL
Vehicle Year
2006/1986
Make / Model
Ranger/BroncoII
Engine Size
4.0L SOHC/2.9L
2WD / 4WD
4WD
My credo
Lead, Follow or get out of my way
So out of all this... I still need two fittings. 😩

Across the bottom are different repair unions... repairs on nylon are easier now then they use to be.

20220713_170045.jpg
 

Uncle Gump

Forum Staff Member
Forum Moderator
Supporting Member
TRS Event Participant
Joined
Sep 17, 2018
Messages
11,149
Reaction score
9,042
Points
113
Location
Ottawa IL
Vehicle Year
2006/1986
Make / Model
Ranger/BroncoII
Engine Size
4.0L SOHC/2.9L
2WD / 4WD
4WD
My credo
Lead, Follow or get out of my way
The newer Dorman connectors also have an improved retaining clip... opposed to the old hairpin style.

20220713_170453.jpg
 

holyford86

Well-Known Member
RBV's on Boost
GMRS Radio License
Joined
Aug 6, 2007
Messages
2,074
Reaction score
261
Points
83
Age
36
Location
Plattsburgh, NY
Vehicle Year
many
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
7
Tire Size
33x12.50R15
I just started my fuel line rework. The Dorman tool works with ease. It's warm today and didn't even use a heat gun. Pushed it right together.

View attachment 78962

I did notice on the truck the supply line switches from 3/8 at the tank to 5/16 leaving the canister filter. And the return line does the opposite. So this kit I bought doesn't nhave reducer fittings. So it looks like I'm gonna need two reducers to finish the lines up. They have nothing local so it's back to the internet...
I've got access to the same kit, the fittings are slightly different but still a big improvement over the factory stuff, I think this is the direction I'm going to go in. Surprising you can't find the fittings you need locally, everyone around here sells the fittings for nylon.
 

Sponsored Ad


Sponsored Ad

Top