1985 4.9 i6
FTE Legend
Joined: Nov 2015
Posts: 30,895
Likes: 4,119
From: Angier, NC
You did use new rubber hode and if so what size?
I can tell you using 3/8 hose from pump to can on fender it will not pull fuel even with 2 clamps.
It uses 5/16 hose at tank & at pump.
Dave ----
I can tell you using 3/8 hose from pump to can on fender it will not pull fuel even with 2 clamps.
It uses 5/16 hose at tank & at pump.
Dave ----
Lead Driver
Joined: Apr 2002
Posts: 5,303
Likes: 1,242
When I read that you changed the fuel pump and sending unit in the same breath I wonder which fuel pump do you have?
I'm not sure but some later model bullnoses used EFI. The 4.9 may have been built with a carb all the way through 86, but at some year it went EFI. What type of fuel pump did you replace? Even some carb 4.9's may have switched from mechanical to electric fuel pumps because of vapor lock. The two Daves will know which years are which. I expect we'll hear from them. Anyway it will help to diagnose your issue knowing which fuel pump you are talking about.
I'm not sure but some later model bullnoses used EFI. The 4.9 may have been built with a carb all the way through 86, but at some year it went EFI. What type of fuel pump did you replace? Even some carb 4.9's may have switched from mechanical to electric fuel pumps because of vapor lock. The two Daves will know which years are which. I expect we'll hear from them. Anyway it will help to diagnose your issue knowing which fuel pump you are talking about.
FTE Legend
Joined: Nov 2015
Posts: 30,895
Likes: 4,119
From: Angier, NC
When I read that you changed the fuel pump and sending unit in the same breath I wonder which fuel pump do you have?
I'm not sure but some later model bullnoses used EFI. The 4.9 may have been built with a carb all the way through 86, but at some year it went EFI. What type of fuel pump did you replace? Even some carb 4.9's may have switched from mechanical to electric fuel pumps because of vapor lock. The two Daves will know which years are which. I expect we'll hear from them. Anyway it will help to diagnose your issue knowing which fuel pump you are talking about.
I'm not sure but some later model bullnoses used EFI. The 4.9 may have been built with a carb all the way through 86, but at some year it went EFI. What type of fuel pump did you replace? Even some carb 4.9's may have switched from mechanical to electric fuel pumps because of vapor lock. The two Daves will know which years are which. I expect we'll hear from them. Anyway it will help to diagnose your issue knowing which fuel pump you are talking about.
83 - 86 the carb went feedback controled by a computer.
87 the 4.9 went EFI till the end.
Dave ----
FTE Legend
Joined: Nov 2015
Posts: 30,895
Likes: 4,119
From: Angier, NC
I am pretty sure the factory one screws into the carb that the fuel line connects to.
There could be another that a PO installed before or after the pump.
Dave ----
There could be another that a PO installed before or after the pump.
Dave ----
Trending Topics
Lead Driver
Joined: Apr 2002
Posts: 5,303
Likes: 1,242
Usually a clogged fuel filter slows fuel production which can affect performance prompting a filter replacement. While renewing the filter is a good idea getting no fuel to the carb may point to a bad fuel pump. If the tank is full of rust then a filter could be completely plugged but performance of the engine would have suffered getting there. When replacing the sending unit was the tank removed, inspected and cleaned out?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
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
Thread
Thread Starter
Forum
Replies
Last Post
4EyedTurd
1987 - 1996 F150 & Larger F-Series Trucks
6
Feb 23, 2023 07:49 AM
chenson48
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
5
Mar 23, 2022 09:44 AM
85Blondie
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
11
Aug 28, 2013 01:16 PM
D. DeBoer
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
Dec 28, 2004 02:54 PM
ODB2
1987 - 1996 F150 & Larger F-Series Trucks
1
May 20, 2004 04:55 PM