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Discussion Starter · #1 ·
Took my 2010 f-250 on an 8 hour road trip, along the way I ran out of fuel in the middle of no where. After getting the fuel system reprimed and the truck running i headed back for home, truck ran fine for a while then all of a sudden at highway speed when I tried to accelerate while in od the truck would reach 2000rpm, then it would feel as though the transmission kicked into neutral and you could feel itslowing down but with the accelerator in any position it would not rev any higher but would tach out on the boost gauge. When you let out on the accelerator it feels as though it goes back in gear and runs fine as long as you don't rev higher than 2000rpm. From a stop it changesthrough all gears fine and runs great until you get to the last gear change and try to go over the 2000 mark. I have no clue what is causing this and it made for climbing hills a pain,
 

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Welcome to the forum.

It did this on all grades? Up, Down & Flat?

Without a trailer?
 

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Discussion Starter · #3 ·
Yes on all grades, but like I said any other gear it will pull strong as ever, it is dpf deleted to
 

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running out of fuel is one of the worst things you can do with these rigs...

in addition to your HPFP pressurizing fuel, it uses it to cool and lubricate itself.. running out and not having that lube and cool, an HPFP can grenade in a matter of seconds.

I'm wagering you have air in your system... how are you tuned? do you have a monitor? you should see 4800psi at idle, and under heavy acceleration you should get to at least 24,000 psi..

turn your monitor to ICP/Rail pressure, and go for a run- see how much pressure you can build...

also, it should be rock steady at idle when you're done.. anywhere from 4800 psi to 5200psi... mine is 4800 steady w/ H&S HD300 base tuning... if it bounces around after your run and at idle, it's tell-tale air in the system...

if that is the case, then the real fun begins.
 

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Discussion Starter · #5 ·
I bought the truck from a dealership already deleted and straight piped, not sure if it has a tune on it or not. I've put 13000 miles on it since I've owned it and not sure when the fuel filters have been changed so I ordered new ones hoping it has sucked up some trash and is just starving it's self at highway speed, if not how would you go about bleeding the air out of the system
 
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