Suction line size

[btoscano]

I would like to replace the suction fuel line between the tank pickup and the lift pump. It will be hard to take the fitting to the store clerk to get the right size unless I want to take the truck apart in their parking lot (not it cold snowy weather). So I am wondering if someone can just tell me the size of fuel line ID/OD that I would need to purchase to slide over the tank quick connect? My truck is a 1993 that uses the hard plastic line, not the metal line.



Thanks,

Brian

 

[dpuckett]

Previous owner of my last 2 trucks had done away with the stupid fitting and just run 3/8" (maybe 5/16- I'm not sure) fuel hose and clamped it on both the lift pump and the steel line. Seems to work just fine for my application.



You still trying to top 20mpg in a 7000# brick at 80+?



Daniel

 

[bgilbert]

It's tiny. Definately not 3/8" ID, maybe OD. More like 5/16" OD. You don't have 3 Dodge Cummins pickups?? I thought everyone did :-laf.

 

[dpuckett]

No, I only have 2 Cummins Dodges.



The line going to the metal part of the fuel inlet on the LP is definitely 5/16 or bigger. The stock line is a thin wall hose, so it could well be a 5/16ID-3/8OD.



DP

 

[btoscano]

Trying to figure out why the truck sometimes seems to have no power to go faster than 60 MPH on the country road by my house... with no trailer. A few weeks before the last pump failed (cam plate, rollers visibly failed) filling up the truck restored power until the final 2-4 days before the pump came apart. Now I've seen intermittant power issues with the rebuilt pump twice on the same road with the the same fuel level. I can't help but wonder if its a fuel line issue.



Brian

 

[JLEONARD]

If you replace and make it to your own design, I say go at least 3/8 ID

 

[sdstriper]

89' part book shows a 5/16 i. d. fuel supply hose to lift pump. It is short in the book so I assume it goes to steel tube under the cab etc.