Fuel Line blew off
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Senior User
Joined: Feb 2010
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Fuel Line blew off
So my brother and I have been putting our 5.8 windsor back in our 89 F250. We spent the afternoon hooking up the last few things and fine filled all the fluids to start the truck. After a few times of cranking it over, the line leaving the fuel pump blew off during cranking. Just wondering if anyone has any ideas why it would do this, other than just a bad connector. ( this could still be it since at this point I gave up for the night) Thanks for any ideas.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Could also be a bad fuel pressure regulator (FPR).
If the FPR does not come off it seat or the return line to the tanks is pinched shut/plugged the pressure can go over 100 PSI and blow a hose off.
If the FPR does not come off it seat or the return line to the tanks is pinched shut/plugged the pressure can go over 100 PSI and blow a hose off.
Posting Guru
Joined: Jan 2002
Posts: 1,346
Likes: 8
From: Baltimore
There are two size duck bill retainer clips used on the fuel
system lines.
The Black clips are 3/8 and the White clips are 5/16.
If you use the wrong size clip the line can blow off. Verify the
hose connection is good by grabbing the hose and give it a good tug.
You can purchase replacement clips in the Help section at
most auto part stores.
I once used the wrong size clip at the fuel filter connection and the fuel line
blew off while I was getting off the highway.
system lines.
The Black clips are 3/8 and the White clips are 5/16.
If you use the wrong size clip the line can blow off. Verify the
hose connection is good by grabbing the hose and give it a good tug.
You can purchase replacement clips in the Help section at
most auto part stores.
I once used the wrong size clip at the fuel filter connection and the fuel line
blew off while I was getting off the highway.
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Cargo Master
Joined: Jul 2009
Posts: 2,541
Likes: 54
From: Des Moines
There are two size duck bill retainer clips used on the fuel
system lines.
The Black clips are 3/8 and the White clips are 5/16.
If you use the wrong size clip the line can blow off. Verify the
hose connection is good by grabbing the hose and give it a good tug.
You can purchase replacement clips in the Help section at
most auto part stores.
I once used the wrong size clip at the fuel filter connection and the fuel line
blew off while I was getting off the highway.
system lines.
The Black clips are 3/8 and the White clips are 5/16.
If you use the wrong size clip the line can blow off. Verify the
hose connection is good by grabbing the hose and give it a good tug.
You can purchase replacement clips in the Help section at
most auto part stores.
I once used the wrong size clip at the fuel filter connection and the fuel line
blew off while I was getting off the highway.
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Thread Starter
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Senior User
Joined: Feb 2010
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its a black clip and the connector to the fuel filter is a white clip so I will make sure I check that when i get the replacement hose. I am thinking that the return line, like subford said might be pinched. Thanks for all the input guys.
Cargo Master
Joined: Jul 2009
Posts: 2,541
Likes: 54
From: Des Moines
This may be a no-no, but the best I could suggest is to pull the return line from the FPR, then shoot compressed air thru it. If you can hear it entering the tank then it's probably not clogged, or the compressed air cleared the clog or is powerful enough to get thru it, whereas returning fuel is not.
Others may need to chime in on this tho- don't act until they do.
Others may need to chime in on this tho- don't act until they do.
Postmaster
Joined: Apr 2008
Posts: 4,802
Likes: 1
If you had a black clip on the pump side and a white one on the filter side, the pump clip is wrong - the fuel lines are 5/16" and require a white clip on both ends. I don't think an all new hose will be needed, just a new clip should suffice unless the connector it slides through got all busted by the old clip letting go. The fuel system has around 40 psi pressure in it even with the return lines free to flow back to the tank, which is enough to blow the hose off a steel line if the clip used is too large.
Thread Starter
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Senior User
Joined: Feb 2010
Posts: 111
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ok great well since I just put the lines back on. I'm going to try and replace the clip on the line. if it blows the new clip off. then I'm going to try and run come compressed air threw the lines to check them. Thanks for all the help.
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