hey guys, this is my first post and i will admit that i am a dodge guy. i do drive a 2008 superduty for work though. this site was recommended to me by a mutual friend from another forum, so maybe you guys can help. next weekend i will be helping a buddy do some work on a 2005 FX4 with the 5.4 L. he got the bad news that he needs to replace his fuel pump, fuel rail sensor, and throttle body assembly. the last ford i worked on was an '84 ranger and that was about 10 years ago. can anybody point me in the right direction as far as pictorial write ups/DIY or a pdf service manual i can download? anything to watch out for or be cautious of? thanks in advance for any help!!

 

anybody??

 

If you can spin a wrench, that's all fairly straight forward. I am curious though, what's the reasoning behind replacing all that stuff?

 

I'm curious too.

You may need to drain the pressure in the rail though before youchange the sensor.

I drained mine by unplugging the fuel pump and then running the truck until it died out... Under the driver's door, on the frame rail, there are two plugs (connections). Unplug those and it cuts power tot he fuel pump.

The fuel rail sensor is just sitting on the drivers side fuel rail with one connection and I think a vacuum line.

Two torx head screws (I think) and it comes off.

Throttle body is just 4 bolts and 2 connections... comes right off easily.

Fuel pump... Good luck!!!

 

well, the main reason it needs to be replaced is because the diagnostics tool at the dealership said it needs to! this truck has spent about 60,000 of it's 100,000 mile life on extremely rough roads in the oil fields of west texas, so a lot of the systems take a real beating. i'm kind of questioning if everything that the dealer says is really needed, but with the abuse the truck takes, it can't hurt to replace it anyways. what happens is, it takes about 20 tries to get the truck started, and once it does, all it seems to want to do is die. there is no increase on throttle or rpms when you step on the go peddle, no response at all. there are a few codes being thrown but the only one i remember off hand is low fuel pressure.

 

the frp sensor will set a DTC because of low fuel pressure FROM THE BAD PUMP(make sure to replace the fuel filter also). i highly doubt thier is anything wrong with the sensor. as for the throttle body what dtc did you get?

 

Thats EXACTLY what my truck does to....when it's acting up.

If I get the "wrench" light... I can just restart the truck and it runs fine.

If I get the "Engine" light. I have to reset the codes with my hand-held programmer to even drive the truck.

My truck has worked flawlessly all week up until this afternoon. It died on me twice in traffic and took about 10 tried for it to actually start.

My sequence:
----------------------------------------------------------------
"Crank: Wrench light"

"turn off and re-crank: Wrench and engine light"

"Plug in programmer: Reset codes and re-crank"

"Repeat...repeat...repeat."

"Finally cranks up with no lights and I can actualy drive it"

"Dies at next stoplight"

"repeat"

------------------------------------------------------------

All this happens IN TRAFFIC.

 

i agree that the sensor may not be bad, but he was able to pick up a whole assembly with the throttle body, fuel rail, sensor, and i don;t know what all else, for about 40 bucks on the bay with i think about 40 for shipping. it only has 40k on it, so if nothing else we may be able to get closer to the root of the problem. does anybody know if you have to remove the bed to get to the fuel pump? i think he's planning on removing it anyway to weld a crack that is forming. he way overloads the capacity with field equipment and tools. at last check it was somewhere over 3k lbs, that sits back there 24/7 on nasty roads. thanks for the replies and keep 'em coming!