Fuel Pump Question
Thread Starter
|
Fleet Mechanic
Joined: Aug 2005
Posts: 1,689
Likes: 29
Fuel Pump Question
Trying to get the 77 5.8 to run. Fuel in tank is clean and good. I can suck the fuel up with a hose to where it comes up on the block. It was pumping fuel when cranking. However, I don't see that happening now. I used a CLEAR tube to attach to the fuel pipe coming in front of the block. I can suck gas with my mouth and fill that clear tube, if I block it with my thumb, it stays in the hose. If I don't, it just drains back.
Do these have a check valve? No matter what I do, while cranking, the fuel is not being pumped out.
Maybe the pump is bad?
Do these have a check valve? No matter what I do, while cranking, the fuel is not being pumped out.
Maybe the pump is bad?
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,139
Likes: 5,779
From: S/W Missouri, Polk county
No check valve, in the system. It should hold prime. If the fuel pump (out port from pump) does not squirt fuel, as you turn it over and the eccentric cam make a rotation, then....
1. You are out of gas
2. Your pick up tube filter sock is crudded over.
3. You could have a hole in a rubber or steel fuel line and the system is sucking air.
4. Your fuel pump has died. Sorry for your loss.
Or you can try this. https://www.siliconeintakes.com/liqu...d--p-9581.html
1. You are out of gas
2. Your pick up tube filter sock is crudded over.
3. You could have a hole in a rubber or steel fuel line and the system is sucking air.
4. Your fuel pump has died. Sorry for your loss.
Or you can try this. https://www.siliconeintakes.com/liqu...d--p-9581.html
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,139
Likes: 5,779
From: S/W Missouri, Polk county
Yes I just have the trouble shooting steps remembered and saved on my computer. So I just post them all. I read where you could pull fuel from the tank to the in port of the pump by mouth. Cough cough. So yes you have gas, the pick up tube filter sock is clean and no dry rot or rust holes in the rubber or steel lines.
I would get the BEST pump you can and NOT the cheapest the parts house offers. Chiny part are junky now days. If you get one, you better get 2 to have a spare on hand when the 1st one lays down on ya.
I would get the BEST pump you can and NOT the cheapest the parts house offers. Chiny part are junky now days. If you get one, you better get 2 to have a spare on hand when the 1st one lays down on ya.
Hotshot
Joined: Feb 2004
Posts: 10,749
Likes: 2,587
From: The Shenandoah Valley
If you are into spares and think about carrying a spare ignition box, carry it in a box, marked so it's upside down in storage.
I wonder too. Used to be I just went to the parts store and they always did well.
Fleet Mechanic
Joined: Jul 2010
Posts: 1,509
Likes: 116
From: St James, Missouri
I think the Edelbrock might be worth a try, if you’ve got enough clearance for it. Still made in the USA but not cheap.
I can tell you that the Precision branded pumps from O’Reilly and Parts City are not good.
I can tell you that the Precision branded pumps from O’Reilly and Parts City are not good.
Trending Topics
FTE Legend
Joined: Nov 2015
Posts: 30,860
Likes: 4,106
From: Angier, NC
You also have to watch the new motor driven pump for high psi out put.
It has been posted on here a few time of guys having high psi with new pumps.
I also had one a few months back put out 18+ psi on a non-Ford.
If I had the air filter on and the windshield in the car I would not have know the psi was over powering the needle and seat.
Took it back and got a replacement of a different brand, more money, but it is working fine.
Dave ----
It has been posted on here a few time of guys having high psi with new pumps.
I also had one a few months back put out 18+ psi on a non-Ford.
If I had the air filter on and the windshield in the car I would not have know the psi was over powering the needle and seat.
Took it back and got a replacement of a different brand, more money, but it is working fine.
Dave ----
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
Hotshot
Joined: Feb 2004
Posts: 10,749
Likes: 2,587
From: The Shenandoah Valley
You also have to watch the new motor driven pump for high psi out put.
It has been posted on here a few time of guys having high psi with new pumps.
I also had one a few months back put out 18+ psi on a non-Ford.
If I had the air filter on and the windshield in the car I would not have know the psi was over powering the needle and seat.
Took it back and got a replacement of a different brand, more money, but it is working fine.
Dave ----
It has been posted on here a few time of guys having high psi with new pumps.
I also had one a few months back put out 18+ psi on a non-Ford.
If I had the air filter on and the windshield in the car I would not have know the psi was over powering the needle and seat.
Took it back and got a replacement of a different brand, more money, but it is working fine.
Dave ----
Why once I had mounted & plumbed a FPR to use with Edelbrock carb, I left it in place with the Holley carb even though the Holley would handle the stock engine driven pump's 7 psi on it now. (After all, the Holley run fine for years without any FPR 
). I just readjusted it from the 5.5 psi used as suggested with the Edelbrock ... to the 6.5 psi as Holley suggested & calibrates their carbs at ... @ sea level.
Thread
Thread Starter
Forum
Replies
Last Post
Garmx023
1961 - 1966 F-100 & Larger F-Series Trucks
4
Aug 18, 2023 04:10 AM
vaultster
1999 - 2003 7.3L Power Stroke Diesel
2
Mar 19, 2007 07:19 PM