fuel pummp question
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Senior User
Joined: Sep 2001
Posts: 356
Likes: 1
fuel pummp question
Hey guys, when i gought my 77 f-150 w/400 the fuel pump went out and i replaced it with an electric one because the man i bought it from said he had replaced it twice in the last couple of months. my question is should i remove the old pump from the engine? currently the fuel lines bypass it they go straight from the elec. pump to the carb.
Thanks
David
Thanks
David
Posting Guru
Joined: Feb 2002
Posts: 2,404
Likes: 3
From: Cleveland, WI USA
fuel pummp question
I have a Carter electronic fuel pump in my 78. The guy that put it in made a metal cover plate and bolted it to where the original pump was. He used lots of RTV too so it wouldn't leak.
If I were you, I'd take it off and cover the hole.
One other thing. My fuel pump is under the hood but I've read here that it should be back by the tank. Some say that it's better to push the fuel that to pull it. I'm considering moving mine.
Kevin K.
If I were you, I'd take it off and cover the hole.
One other thing. My fuel pump is under the hood but I've read here that it should be back by the tank. Some say that it's better to push the fuel that to pull it. I'm considering moving mine.
Kevin K.
Elder User
Joined: Apr 2001
Posts: 997
Likes: 0
From: texarkana, tx
fuel pummp question
I'd take the pump off...one less thing the engine needs to work on and one less thing to break. Cover the hole with one of those fancy chrome fuel pump covers like I got a jegs.com.
I run mine using only the electric with no problems....BUT I keep a spare mechanical in the tool box "just-in-case"...
I run mine using only the electric with no problems....BUT I keep a spare mechanical in the tool box "just-in-case"...
Senior User
Joined: Apr 2002
Posts: 146
Likes: 0
From: Lawrenceville USA
fuel pummp question
Watch out for rust flakes. They get under umbrella valves and the pump won't work well (maybe that's why that guy replaced it twice). I put in a "prefilter" on my brother's 57 Ford because it kept doing that. My 79 has stumbled and died a few times from fine rust that plugs up the fuel filter as well. I can take it off and dump it out a couple of times and the truck will run fine. That could be what happened to the old owner, and maybe he happened to replace the filter each time he got a new pump. Maybe he got really cheesy pumps. I still like the mechanicals, but I'm an old guy...
Post Fiend
Joined: Sep 2000
Posts: 8,238
Likes: 3
From: Oregon
fuel pummp question
Electrics ARE better at pushing than pulling. Your electric should be mounted near the tank and should have an in-line filter between the tank and pump. I belive most pump instructions say as much. Although it doesn't hurt anything to leave your mechanical on, I'd recomend removing it as the cover plates run about 5$ and can be gotten about anywhere. Make sure you don't get an electric advertised at more than 8psi otherwise you should run a regulator and return line. The Carter electrics have a pretty good track record, good luck.
Freshman User
Joined: Feb 2002
Posts: 48
Likes: 0
From: Texas
fuel pummp question
Agree with all previous. But how many 100s of thousands of early model trucks are running with the original mechanical fuel pumps? Don't cover up your problem with a supposed fix. Also if the electric you install goes much over 7 psi you will run into carb flooding problems. Fix the original problem and leave things be. Pull the tank...whatever. You'll have better service and be happier.
Texas Bird
Daddy's First Car Was A Model T--He Bought It Used For $11.50 And Drove It Home
1979 F150 Custom--Betsy--302 2V, 4sp.OD(RUG)
1978 F150 Ranger XLT--Snuffy--400 2V, C6
Texas Bird
Daddy's First Car Was A Model T--He Bought It Used For $11.50 And Drove It Home
1979 F150 Custom--Betsy--302 2V, 4sp.OD(RUG)
1978 F150 Ranger XLT--Snuffy--400 2V, C6
