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Odd fuel issue

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Old Mar 3, 2024 | 06:12 PM
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Default Odd fuel issue

Okay this is going to cover many things by itself would be easy to fix but trying to fix something after its been replaced makes me want to just bang my head against something hard okay here it goes all the things below have been done. Now the odd part is after replacing the parts once the truck has been driving 10-20 minutes it will feel like it looses power, stutters, you give it gas an nothing it just dies out. pull over let it sit 5 minutes you can drive another 2-10 miles then the same thing. rinse and repeat until you are where you need to go.
2007 F150 5.4l 4x4
241,0000 miles
oil pressure is good.
alternator/battery is good
water temp good
I drive it maybe 5,000 a month
no oil leaks,

P0191 - fuel pressure sensor
- okay replaced -
still did not stay running
- okay next -
fuel pump driver module
Fuel pump
- stayed running for 2 weeks -
p0191 is back - why not replace it again - nope still broke

Here is where I am at, the truck looses fuel pressure or just can not get signal to keep it going after its been driving/warmed up it has to be something electrical. Here are my thoughts- If you made it this far reading, thank you.
Throttle body,
injectors
spark plugs or coils
Air filter - will look but im typing this up.
mass air flow sensor the mixture is getting jacked up.
cable that is loosing signal once its warm.

I know im not the first with this cause I have been reading all the individual posts but mine has multiple issues.

Last edited by Chuck112; Mar 3, 2024 at 06:20 PM.
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Old Mar 3, 2024 | 10:27 PM
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Crank position sensor/wiring or it's still a bad connection at the FPDM or it's ground connection.
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Old Mar 4, 2024 | 04:26 AM
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I'd put an OBD reader on it and monitor the fuel pressure and the fuel pressure sensor while driving until it does it again to see if either gets sudden change in reading when problem occurs.
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Old Mar 4, 2024 | 08:59 AM
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Originally Posted by getterdun
I'd put an OBD reader on it and monitor the fuel pressure and the fuel pressure sensor while driving until it does it again to see if either gets sudden change in reading when problem occurs.
That's one signal. The fuel pressure reading comes from the rail sensor.
I pretty sure rhe truck will still run with the rail sensor unplugged, so don't waste more time replacing or testing it, it is probably working correctly and letting you know that the fuel pressure is dropping out of range
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Old Mar 4, 2024 | 10:57 AM
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Thank you everyone who has posted so far, I am getting ready to go down this rabbit hole. While I do not have my OBD reader my son took it out of the truck and its about an hour away I do have a programmer and I am going to see if it will let me see the issues. I did get a parts store to do the reading, plus when my son had it I had him take it to a shop to replace the fpdm and fuel pump. Way to much to ask someone else to do the work.. Now I have it back and its time to start putting money into it to figure this out.. worst case It gets a tune up...lol plus a few parts that break alot.. Crank Sensor. ECT
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Old Mar 5, 2024 | 05:26 AM
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Defective new fuel pump check valve?
When you disconnect the fuel pressure transducer, the pump operates at a 100 percent duty cycle as a test
Pinpoint test steps for P0191 was the first test you missed doing when you replaced the fuel pressure sensor transducer
Probably did need a new fuel pump, it just may have failed if it was a cheap China jippo pump (ask me how I know)
Get after it checking PIDS and doing the pinpoint tests for the codes you have now
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Old Mar 5, 2024 | 04:44 PM
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once the truck has been driving 10-20 minutes it will feel like it looses power, stutters, you give it gas an nothing it just dies out. pull over let it sit 5 minutes you can drive another 2-10 miles then the same thing. rinse and repeat
I had a car that did this once and it was caused by a defective fuel pump. I suggest you get an OBD tool that can read fuel pressure so you can do what I suggested before. You could also climb under the FSDM and examine the wires and wire connectors there. Also disconnect the connector(s) and examine for corrosion.
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Old Mar 6, 2024 | 10:09 AM
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Last edited by Chuck112; Mar 6, 2024 at 10:14 AM. Reason: wrong picture
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Old Mar 6, 2024 | 10:13 AM
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the very last image that has the p1000 is after I cleared it the codes and took the truck on a drive. These are the codes that popped up again. I know its 2 of 3 things that could be the issue. module and or Fuel pump and you are going to say why not the Fuel pressure P0191, well I have 3 in the truck the original, new prior to the module and fuel pump being replaced and the new one after it stopped working again. original is out of the picture. I am only left with the 2 new ones.. not older than 1 month and less then a week in the truck both still showing the same issue. oh one fuel pressure sensor from "advance auto parts second from Orileys"

Last edited by Chuck112; Mar 6, 2024 at 10:16 AM.
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Old Mar 6, 2024 | 11:19 AM
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The fuel tank is contaminated and plugging up new fuel pumps?
What does the fuel pump pressure pid say?
So, you cleared the codes and retested and those codes came back
Go through the pinpoint test steps in the PCED for the lowest numerical code first
AllData at your library for the pinpoint tests for P0191 would be my advice
At least read through it even if you cannot perform it
I'd also take a fuel sample and use a borescope to check the inside of the gas tank to see how clean it is inside
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