PM from:
The reason I asked is because of historical problems with the fuel pickup assemblies.
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The black thing on the end of the fuel pickup assembly is the intake snout. Sometimes (like in my case) the intake snout is so loosely mounted that it sucks air at the top when the fuel level in the tank drops below that point. So when the fuel level drops below about 1/4 tank, the level gets below the top of the black pickup snout and it begins to suck air. When that happens engines can run very roughly or not run at all.
Several years ago a seldom seen member of this forum named Hutch-in-Augusta identified several inherent flaws in the Superduty fuel system where air gets sucked into the system causing poor running, lifter clatter and "cackle" as it became known as. What he did was to develope a fix that eliminated many weak points in the system. The materials to fix the problems are readily available from most parts places on a piece-by-piece basis, or as a kit from several different sources. One of the sources for the kit is
ITP DIESEL, a site sponsor. You can look at the install instructions
HERE. (Note: the kit from ITP is available with or without the spin-on fuel filter, but note that a pre-pump filter will help protect and prolong the life of your pump.)
