Bad Fuel Pump?
#1
09-14-2018, 10:16 AM
#2
09-14-2018, 12:53 PM
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.
#3
09-14-2018, 12:57 PM
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.
#4
09-14-2018, 01:13 PM
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
#5
09-14-2018, 01:45 PM
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?
#6
09-16-2018, 08:40 PM
#7
09-16-2018, 08:58 PM
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#11
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#14
09-17-2018, 12:02 PM
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.