2500 HD quit running while idling

Fossil Rock · July 21, 2016

and it won't start up again. Fuel gauge is over half, battery is good.

Released the pressure on the schrader valve on the fuel rail and nothing but air came out .... I thought this to be somewhat odd.

Raptordude · July 21, 2016

If nothing came out but air that normally indicates a bad fuel pump. Do you hear the pump run when you turn the key?

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davester · July 22, 2016

Yeah, maybe first check the fuse for it, and that there's is power at the fuse box, but if it's good, you get the fun of dropping the tank to get to the fuel pump (or alternately, lifting the truck bed).

Raptordude · July 22, 2016

Lifting the truck bed is easy. I've done it twice

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Fossil Rock · July 22, 2016

Thanks guys, I've come to the same conclusion and this will be my first time changing a fuel pump on a full size truck.

I agree that tilting the bed will be the best option as I will be doing this alone. I have all the necessary safety stuff and the new pump has been ordered.

One question I do have is, which fuse goes with the fuel pump ? The markings aren't very clear. The relay is clicking as it should and I know that may be a false positive in some cases so I'll be checking that too before I start on the bed.

Raptordude · July 22, 2016

I would recommend 4 people...the bed is heavy! It's 8 bolts on the bottom, easy to get to, then disconnect the gas filler, then unplug the tail light wires. Get 4 people to help you lift it onto some saw horses. After that it's butter. The fuel pump is right there, easy to get to

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TAZ DEVIL · July 23, 2016

Yeah, turn key on and listen for pump. If need to move truck and don't have help (pushing or pulling), beat on bottom of tank with something like wood 2x4 with key on, sometimes that will get pump going so you can start it and move it.

Fossil Rock · July 23, 2016

Thanks for the suggestions.

I will be doing the 'tilt bed' method, not taking the bed completely off. Already tried banging the tank and listening for the pump running to no avail.

Raptordude · July 23, 2016

I've seen guys do the tilt method, and it can work. However, it is almost more work than just taking it off completely in order to get it lifted right. Plus then you don't run the risk of it smashing your head as you're leaned over your fuel pump

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Fossil Rock · July 25, 2016

Does this look right? The videos and pictures I've seen have 2 electric leads.

Fossil Rock · July 25, 2016

I suppose it is...

Raptordude · July 25, 2016

That's right, mine had just one

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Fossil Rock · July 25, 2016

Any step by step guides on here to rebuild the assembly. I'm sure I can figure it out, just wanted to speed things along.

New pump came in today and would like to get finished up if at all possible today.

Fossil Rock · July 25, 2016

Guess I'm pooched. Turns out the pump in the truck is not a factory pump (assembly and all). That probably means the tank is not the correct one for the truck either.

These are the numbers on the side of the old pump: FR0403471 / 310812CT. Can anyone identify this part ?

Turns out it's a Airtex E3501M.