Weird filter header question

[Diesel JD]

Hey does anyone know if the fuel schrader/bleeder valve shows the fuel pressure before or after the filter? The reason I ask is that I have an inline filter and seemingly plenty of fuel pressure at the schrader valve, but the inline clear job is only about 1/2 full of fuel, and I can tell its not plugged(also recently replaced) I was wondering if the main filter might be plugged and is putting excessive back pressure on the system. Thoughts? Whoever said these things need a pressure indicator gauge is right cause who knows otherwise?

 

[Agnem]

Inline filters laid horizontally rarely fill more than half. The air is trapped in there and can't get out. Seems like a dumb design to me since half the filter media goes unused.

 

[Diesel JD]

yeah, that's true, I've seen them fill and not fill at random on this truck, and usually its as you say half full or less in other applications, still do you all know about if the schrader valve is prefilter or post filter?

 

[Ironman03R]

I have an inline clear filter on the chevelle and it has never been full and it feeds over 400hp.