Sputtering and Missing While Driving???

[huntere7.3]

So my truck started sputtering and missing while driving yesterday. it idles fine. sometimes i have to put it in neutral to actually help it settle out if its missing real bad. i replaced the fuel filter within the last 5,000 miles. could it be bad already?? just hoping its not the fuel pump. i know the glowplugs on my truck arn't very hot. when i got it last year it wouldnt start till i replaced the GPR. and it still starts a little hard so i plug it in all the time. yesterday was the first time i was unable to plug the truck in all summer. she started a little rough and smoked a little but other than that fine. i let her warm up for 5 min and pulled off and she just started sputtering and cutting out. by the end of the day it pretty much worked itself out and stopped after putting in a half bottle of PS cetane booster and running a 1/4 tank through her. got her all plugged in now and gettin ready to go start it for the day so we'll see how it goes today.ill keep posted. Send me any ideas PLEASE!! NEED HELP! dont want to relace that pump

[kanuck15]

Sounds like the FPR screen is plugged up maybe?

[huntere7.3]

Checked it and the screen looks fine. relplaced the fuel filter and it doin the same thing. another thing is it misses at all rpms. whether im driving easy at 1700 or harder at 2200 it doesnt matter. it just misses harder and shakes harder at 2200. and it seems to work itself out a little and do it less and less by the end of the day after starting and driving a half dozen times throughout the day. hope thats some kind of clue. THANKS

[Cliffordthebigreddually]

Check the oil if its low it cuts power to save the motor mine had the same problem and works fine now

[huntere7.3]

oil is good and is fresh. changed within the last 200 miles

[Cliffordthebigreddually]

Maybe a transfer pump

[ryandamo]

yea, its prbably the transfer pump if it gets worse at higher rpm, or maybee a picykup in the tarnk is clogged? try to test fuel pressure

[huntere7.3]

Im working on checkin the transfer pump, but it doesnt seem to get any worse at a higher rpm. sometimes it actually misses more at low rpms but other than that it just seems to cut out wherever its at.

[huntere7.3]

So the wierdest thing happened yesterday. the truck had been slowly running better and better as i did minor things to it(mainly changed the filter agian) And when i say better i dont mean good. it still was cutting out while driving, but was happening less and less frequently. it seemed to be working itself out. i had been running both tanks down running PSbooster as well and got them down to a 1/4 yesterday. So i went to the gas station and filled up the front tank, filled the rear to 1/2. when i went to leave i noticed it started a little rough but that was the least of what was to come. it immidiately starting cutting in and out as bad as when all this started. its so bad that i pull over everytime and shut it down and let her settle herself for a min. sometimes it cuts out so bad that the wait to start light flashes. so the truck is obviously shutting all the way down and firinging again?? i'm wondering why it ran alright all day and on the way to the gas station, and then went back to horrible when i filled the tanks. I really hope that is some kind of big clue. Thanks

[huntere7.3]

And the rear tank seems to make the truck run worse right now if thats any other clue