6.4 Left me stranded !! NEED HELP !!

[capdaddy420]

Let me start off by saying this is the first diesel I have ever owned. I bought the truck used about three weeks ago. I havent even made the first payment and it has left me stranded allready.

I was driving down the road and my tuner started beeping at me saying i had low fuel pressure, then the truck died. After sitting for about 10 mins, It fired back up. I made it about two miles. I repeated this about 3 times before making it to a parking lot where i could leave it.

the truck will crank and idle with no problems whatsoever. as soon as i get a load on it , it stalls.

I do not even know where to begin. I assume the first thing i need to do is change the fuel filters. I really need a seasoned vet to chime in and give me some pointers.

Please Help !!

[04blackcrewcab]

Codes? Maybe your hpfp is going out. How many miles? What mods? etc.

[capdaddy420]

It is not throwing any codes. I get a 2236 (I think) from time to time ,but I think its the ebp sensor. It is an 08 F-350 cc/lb srw. It has an H&S airbox, dpf delete, egr delete, and a Spartan 275 tune. All of this was on the truck when I bought it and I didn't even know it till I bought the truck. I saw the tuner box but I knew nothing about it. Everything I know now I got from reading this forum and talking with a tech from Spartan. I hope it is not the hpfp, cause I am not equipped to pull a cab. Any help will be super !

[capdaddy420]

Oh yeah, it has 97000 miles on it !

[04blackcrewcab]

Hpfp does not require cab removal to replace but that does make it a little easier if you do have lift access. Does your Spartan monitor rail pressure? Maybe turn that on to see what your fuel rail pressure is.

[capdaddy420]

It does show the frp. At idle it is around 6700psi. At normal driving it was usually around 10-12k psi. When it stalled the pressure just fell. Like I said it will idle all day and the fuel pressure looks good. Only when its under a load, driving down the road is when it wants to act up.

[04blackcrewcab]

Interesting, At idle it seems like the frp is just a tad too high. "Usually" the frp running a 275 tune would be about 5700-5700 psi, and at WOT it should go up to 25ksi or so. Have you messed around with the tuner at all? Maybe loading on a different tune? Maybe it could be a fluke with your tuner. Wouldn't hurt to give it a shot.

[travisH3]

How are fuel filters?

[capdaddy420]

I loaded the 275 tune myself. The dealership I bought it from had turned the tune off. What should the filters look like .

[04blackcrewcab]

If you have any doubt about the condition of the fuel filters you really need to get those changed out asap.