I've got a awesome one for y'all need all the help I can get ..... 2001 7.3 I had the intake up fall apart in the tank and cause havoc with fuel system ... Now after number 6 injector has been replace along with a couple fuel filters and the tank droped and cleaned and shower head pick replaced I'm still fighting with this issue btw I have no codes other then a few body codes I'm going crazy on this one .....Help lol ... The truck has a random bobble more noticeable after a acceleration while at idle ... It comes and goes almost sounds like valves but it comes and goes I think it's fuel related ... When the truck first starts up cold not really all that noticeable but after driving around a few miles truck bobbles and misses and shows a loss of power ..... What am I missing ???????

 

Did you take apart the mixing chamber (white plastic thing on the fuel pick up in the tank) and clean the 2 screens inside there? Low fuel pressure can cause all sorts of rattles and knocks that sound mechanical. The best bet would be to plumb in a fuel pressure gauge and monitor pressure while driving. There are 2 ports on the back of the fuel bowl you can use to hook up a gauge.

 

Moved to the 1999 - 2003 7.3L Powerstroke Diesel forum.

 

Fuel pressure and air in the system. Do the FRX mod and see if that helps. It makes it much quiter. With 280K miles you could just have bad injectors or two. I've also read on here about pulling injectors and checking o-rings. There's been one or two on here that caught this by accident, changed o-rings and problem solved.

Chet

 

Buzz test threw no codes although passenger side bank sounds a bit weak ... I haven't changed that valve cover harness yet also is there a link to the frx mod for the tank that you could post .... Also when the pump cycles for those 2 seconds or so when key is switched on the pump sounds like hell any thoughts on this ????? Thanks y'all

 

Here ya go this one is called the Hutch Mod.
Welcome to guzzle's In-tank Hutch Mod Web Page

And while you are in there do this one too
http://www.guzzle7pt3.com/harpoon.php

 

Riffraff Diesel: Fuel Rail Crossover™

 

I think your pump is on its way out. Mine did the same thing. Drain your fuel bowl and then turn your key on but dont start and see how long your fuel bowl takes to fill back up. It should only. take a couple seconds. Also ck ur UVCH 9 pin connector.

 

Hutch mod needed.... Bosch fuel pump was original I had a extra fuel pump so I replaced still had problem so I pulled fuel pump feed line and blew air threw the lines till I heard air and bubbles sounds in tank re connected and cranked up ........ Problem found fuel tank pick up ....." the hutch mod " I haven't had to do one till know I'm gonna do video and record what I did and post to forum ..... Thank you to for all the help and ideas ... Remember to support the good forums out there .... Especially ford-trucks.com

 

Good find Brandon. Glad you found the problem. Its happened to many on here. I have yet to drop my tank either. It is in the future.

Chet

 

Glad you found the problem. Now the fun part of dropping the tank or pulling the bed. If you drop the tank try and get a second person, it will be a 100 times easier.

 

I dropped the tank the other night with some buddies and help of few beers to clean the tank and install new pick up I'm gonna order the hutch mod from one of the above post cause I'm pressed for time .. When I dropped it the first time I was unaware there was screens inside the white plastic mixing thing...lesson learned thanks tho