Bad Fuel Pump?
Thread Starter
|
More Turbo
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Bad Fuel Pump?
Recently ive been driving around and when I take a corner my fuel pressure goes from 60PSI to 45PSI. My fuel tank is 1/2 Full and I have done the Hutch/Harpoon Mod.
Is my fuel pump screwed up? Trucks got 310K on it.
TIA!
Is my fuel pump screwed up? Trucks got 310K on it.
TIA!
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
Could easily be your fuel pump, especially at that mileage. My son's OEM pump made it to almost 300K, and mine made it to about 280K miles.
However, if it's only happening when you're making a turn, it sounds like you may have a hole in your pickup line (in the tank) at about the 1/2 tank mark. Generally, most folks who see this see it at about the 1/4 to 1/3 tank level, but it really depends on the long term history of how long it has sat at whatever level the hole occurs. If the pickup tube is indeed the problem, you'll have to get back in there to cut and install a new pickup tube.
I would go ahead and replace the pump (if it's indeed original), and see if that resolve the issue. A new Bosch pump can be had for about $120 and their easy to install. If it does not resolve your issue, I believe, from what little you've shared thus far, that the in tank tube is the next line of attack.
Replacing the pump is a great thing to do at your mileage. Even if it's not the problem today, it will be in the not so distant future, and probably when you can least afford the inconvenience of changing the pump on the side of the road or in a parking lot away from home.
However, if it's only happening when you're making a turn, it sounds like you may have a hole in your pickup line (in the tank) at about the 1/2 tank mark. Generally, most folks who see this see it at about the 1/4 to 1/3 tank level, but it really depends on the long term history of how long it has sat at whatever level the hole occurs. If the pickup tube is indeed the problem, you'll have to get back in there to cut and install a new pickup tube.
I would go ahead and replace the pump (if it's indeed original), and see if that resolve the issue. A new Bosch pump can be had for about $120 and their easy to install. If it does not resolve your issue, I believe, from what little you've shared thus far, that the in tank tube is the next line of attack.
Replacing the pump is a great thing to do at your mileage. Even if it's not the problem today, it will be in the not so distant future, and probably when you can least afford the inconvenience of changing the pump on the side of the road or in a parking lot away from home.
Thread Starter
|
More Turbo
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Could easily be your fuel pump, especially at that mileage. My OEM pump made it to about 275K.
However, if it's only happening when you're making a turn, it sounds like you may have a hole in your pickup line (in the tank) at about the 1/2 tank mark. Generally, most folks who see this see it at about the 1/4 to 1/3 tank level, but it really depends on the long term history of how long it has sat at whatever level the hole occurs. If the pickup tube is indeed the problem, you'll have to get back in there to cut and install a new pickup tube.
I would go ahead and replace the pump (if it's indeed original), and see if that resolve the issue. A new Bosch pump can be had for about $120 and their easy to install. If it does not resolve your issue, I believe, from what little you've shared thus far, that the in tank tube is the next line of attack.
Replacing the pump is a great thing to do at your mileage. Even if it's not the problem today, it will be in the not so distant future, and probably when you can least afford the inconvenience of changing the pump on the side of the road or in a parking lot away from home.
However, if it's only happening when you're making a turn, it sounds like you may have a hole in your pickup line (in the tank) at about the 1/2 tank mark. Generally, most folks who see this see it at about the 1/4 to 1/3 tank level, but it really depends on the long term history of how long it has sat at whatever level the hole occurs. If the pickup tube is indeed the problem, you'll have to get back in there to cut and install a new pickup tube.
I would go ahead and replace the pump (if it's indeed original), and see if that resolve the issue. A new Bosch pump can be had for about $120 and their easy to install. If it does not resolve your issue, I believe, from what little you've shared thus far, that the in tank tube is the next line of attack.
Replacing the pump is a great thing to do at your mileage. Even if it's not the problem today, it will be in the not so distant future, and probably when you can least afford the inconvenience of changing the pump on the side of the road or in a parking lot away from home.
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
No, not inertial. There is a ball check inside the pump suction, but if I recall correctly, it is a pressure relief valve which recirculates fuel back into the pump suction in the event of a plugged fuel filter in the engine valley. Regardless, if your suction line leaks air into the pump, the pump will not produce the fuel flow or pressure you need.
Below is a link to the thread where I shared a PDF of the entire pump torn down, and Figures 24-26 on Page 6 show the impeller design which is sort of like a modified version of a rotary lobe pump. The pump being torn down came from my son's truck when he replaced his pump at almost 300K miles.
https://www.ford-trucks.com/forums/1...-and-pics.html
Below is a link to the thread where I shared a PDF of the entire pump torn down, and Figures 24-26 on Page 6 show the impeller design which is sort of like a modified version of a rotary lobe pump. The pump being torn down came from my son's truck when he replaced his pump at almost 300K miles.
https://www.ford-trucks.com/forums/1...-and-pics.html
Thread Starter
|
More Turbo
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
No, not inertial. There is a ball check inside the pump suction, but if I recall correctly, it is a pressure relief valve which recirculates fuel back into the pump suction in the event of a plugged fuel filter in the engine valley. Regardless, if your suction line leaks air into the pump, the pump will not produce the fuel flow or pressure you need.
Below is a link to the thread where I shared a PDF of the entire pump torn down, and Figures 24-26 on Page 6 show the impeller design which is sort of like a modified version of a rotary lobe pump. The pump being torn down came from my son's truck when he replaced his pump at almost 300K miles.
https://www.ford-trucks.com/forums/1...-and-pics.html
Below is a link to the thread where I shared a PDF of the entire pump torn down, and Figures 24-26 on Page 6 show the impeller design which is sort of like a modified version of a rotary lobe pump. The pump being torn down came from my son's truck when he replaced his pump at almost 300K miles.
https://www.ford-trucks.com/forums/1...-and-pics.html
This is the original fuel pump, correct?
Thread Starter
|
More Turbo
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Trending Topics
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
How many miles have you driven since installing the Racor? When you installed the Racor filter did you replace the entire suction stock hose aka fuel injection hose> sending unit to Racor to Pump ? Double clamp turned 180* on all fittings?
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 Starter
|
More Turbo
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Been 10k, all new hose, all clamps are doubled up 180*
Thread Starter
|
More Turbo
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Thread Starter
|
More Turbo
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Also, when the truck is running it’ll usually run between 60-62 psi at idle. When you first start the truck itll be at 60psi and then will creep up to 62 after 30 seconds or so. I am also having an issue with high EGTs with low boost/exhaust back pressure, with no signs of leaks. IDK if this could be related to that.