sorry, not sure what you mean, motorcraft, or ford, barely makes anything for their own vehicles. The first replacement regulators I got were by GP sorenson, this napa one starts with an E, but looks exactly the same. Almost makes me wonder if someone was in there before, or I am not plugging it in correctly. It only goes in one way, and when the o rings catch, it kind of snaps in, then i put the snap ring on and its tight. Would someone have been able to put a rail from a 5.4 on there? And if so, would it be a bigger size regulator?

 

Well, I gave up on my search for a fuel pressure regulator that works, after the 5th one, and bought an entire used fuel rail with regulator off of ebay for 75 bucks, which is only 10 more bucks than a regulator costs anyways. It apparently is in the mail and will update you guys soon.

It does worry me a little bit that it does start to fire every day for a second, but even with the return line pinched off, creating pressure, it will not run. Still floods out. But first things first, and gonna get fuel pressure, then confirm that pressure is correct. So as to not get ahead of myself.

 

Well, after receiving the new fuel rail, only to find it will not fit like it said it would, I decided to get a closer look at the fuel rail that is on it. I really didnt want to take the intake off , so after taking all hoses and wires off, I wiggled it around so I could see inside the regulators hole. In the smaller, inner hole that goes to the return line, I took a small plastic toothpick and felt the surface of it. It has some small pitting and scratches on it, so am going to go ahead and get a new rail from somewhere.

I am wondering what on earth could cause this to happen?
Also, does anyone have any good reccomendations for aftermarket?

 

I went to the salvage yard and got a fuel rail, put it on and bolted it down, and suddenly had fuel pressure. So, once again put all the different lines back on, cycled the key a few times to pump it up, put the battery charger on, just to be safe, even tho its a brand new interstate I just bought, and tried to start it. It did the same thing, it started for a second, then died, and wouldnt do it again. It also wouldnt hold pressure again.
Anyways its goin to the shop today, hopefully they digure it out for me. Outta ideas.

 

Going back to your very first post, you said you replaced parts that include the fuel pump.

Q. Did you replace just the pump motor or did you replace the complete module?

Q. If you replaced the complete module, what did you use for a replacement.

There is a check valve in that module that is probably faulty. It's job is build pressure and to prevent pressure leakdown when the system is shut off.

 

I just replaced the pump motor, for some reason I thought the check valve was in the pump?

 

also I can pinch the return lune off and it makes pressure.

I have bought and returned 5 fuel pressure regulators now, at this point I actually have 4 different ones, with one thats original, one from a junkyard, and 2 new ones, waiting to get returned.
If the regulator is the problem, i think i have covered that base.
Unfortunately after all this headache and ridiculous amount of time, I finally dropped it offat a shop. Im gonna feel bad when they tell me what it is if they can figure it out, but thats how I am gonna have to learn apparently. I will be sure to post results of what they say, and maybe it will help somebody.

 

Sometimes that's how it goes Steve, kudos to you for giving it a real college try. I am damn curious wth is up with your truck. Hopefully it isn't an arm and a leg to fix.

 

And thank you SO much for helping me, its been quite the mental breakdown for me. You have been so supportive. I just hope that my plight will help others, like I have looked for help.
Also I am sure I missed something, that I overlooked. Here is to hopin! 💣

 

My prediction is that it's going to be the pump module (not the pump motor).

 

The thing that leans me away from that is how it holds pressure with the return line pinched off.

 

Well, the shop called today, and reported some bad news. There is no compression in 2 cylinders on the left side apparently and everything is flooded badly. He wants to know if I want him to continue working on it ir not, and gave me the weekend to decide. In the midst of this he said he got fuel pressure up to 35 psi, and I forgot to ask him how, but will find out on monday to let everyone know.

Any advice would be greatly appreciated, thanks again.

 

I think you have some stuck open injectors. Referring back to the first page:

Hope you didn't hydrolock it - with no compression in 2 cylinders I think you are looking at rebuild or replacement.

 

Ive been looking up some possibilities online, and found one person had the same symptoms, and he needed a head gasket to resolve it. Either way, I think I am going to try to do this myself, as I cant afford to pay a couple thousand dollars to fix it.
I still have a lot of more research to do about hydrolock, and I wonder if I should just rebuild the whole dang thing. I have built a 350 into a 358 before, but that was about 20 years ago.

 

Get a reference book, I've had my engine apart. It's really no more complicated than that 350 if you follow a manual on rebuilding it.