460 fuel pump
Posting Guru
Joined: Jun 2004
Posts: 1,635
Likes: 0
From: Niceville, FL.
From what I understand the reason for Ford changing to the electric pump was to eliminate problems with vapor lock on 460's. Electric pump pushes fuel from the tank, mechanical pump "sucks" fuel from the tank. To convert back to a mechanical pump you'd have to remove the electric pump and replace it with a pickup tube of some sort and replumb the fuel lines. Many times, the reason electric pumps fail is due to a clogged fuel filter which causes too much current to be drawn by the pumps. Be sure to check/replace the filter in the carburetor inlet as well as the one in the tank.
Thread Starter
|
New User
Joined: May 2008
Posts: 4
Likes: 0
Thanks for reply
I will check pump and filters today. Truck has dump body easy to get to tank. Think I will replace relay also. I have a 1975 F350 400ci engine mach. pump never gave me the headaches the 460 has.
Thanks again
Thanks again
Thread Starter
|
New User
Joined: May 2008
Posts: 4
Likes: 0
pump & relay
Replaced pump and relay - ran fine not cutting out
However relay still getting hot.
Might try the mech. pump looks easy. replace in tank pump with hose and some kind of filter for pickup - plumming for mach. pump seem easy. reading wire diagram for electrical pump system is nuts / oil switch two hots from switch and selonoid.
should be easy to vent to prevent vapor lock.
wonder if cam has lobe for mech pump?
thanks Paul
However relay still getting hot.
Might try the mech. pump looks easy. replace in tank pump with hose and some kind of filter for pickup - plumming for mach. pump seem easy. reading wire diagram for electrical pump system is nuts / oil switch two hots from switch and selonoid.
should be easy to vent to prevent vapor lock.
wonder if cam has lobe for mech pump?
thanks Paul
Laughing Gas
Joined: Aug 2006
Posts: 1,249
Likes: 10
From: oklahoma
huh? guys this aint no chevy its a 460 look at timing cover 1st to see if its got a place for a fuel pump is were i'd start
Trending Topics
Thread Starter
|
New User
Joined: May 2008
Posts: 4
Likes: 0
fuel pump cover plate
There is a fuel pump cover plate
not sure what push rod your talking about
every ford mach. fuel pump I have replaced had push rod attached to it
not sure what push rod your talking about
every ford mach. fuel pump I have replaced had push rod attached to it
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Moderator
Joined: Jan 2001
Posts: 56,973
Likes: 2,731
From: Virginia
Be careful. If your mechanical pump develops a hole in the diaphragm, the electric fuel pump can fill the engine crankcase with fuel.
Junior User
Joined: Oct 2005
Posts: 61
Likes: 0
From: Arvada, CO
Good point, and that same caution was pointed out in the Holley install notes that came with the pump.
New User
Joined: Jul 2008
Posts: 11
Likes: 0
1983 E350 rockwood motor home with 460cu.in. hot fuel option would not pull itself up a small hill without missing real bad and at times shutting down. installed new 5-8 lb fuel pump it ran great untill one day while driving down the road it just shut down on level ground would not restart untill it cooled down. when it did it only ran about 1 mile and same thing! after reading in this forum about others problems i think it might be a relay getting hot and shutting fuel off trouble is i cant locate relay need help
Junior User
Joined: Oct 2005
Posts: 61
Likes: 0
From: Arvada, CO
The diagrams have been posted on the forums, unfortunately I can't recall exactly where right now. If you search for fuel pump or my username DBAPilotDad you should find them - on mine (single tank), the oil pressure switch is on the back driver's side of the engine (under the dog house), the fuel cutoff switch is on the passenger foot well and the fuel relay is under the hood behind the driver's side headlight on the fender wall.
How about this timing ... just a couple of threads down - there's some diagrams!!!
https://www.ford-trucks.com/forums/7...-question.html
How about this timing ... just a couple of threads down - there's some diagrams!!!
https://www.ford-trucks.com/forums/7...-question.html
Fleet Mechanic
Joined: Jan 2005
Posts: 1,413
Likes: 14
From: cape may county NJ
On my 84 460 I was trying to put most of the fuel system back to factory and had a lot of problems but thats another story,anyway I had a mechanical fuel pump installed and left the new electric pump in the tank and just left it unpowered and everything worked fine and is still driving around with no problems of a vapor lock and no problems starting even if it sits for a long time.