Just changed my fuel filter in my 97 F350 7.3. Drained and removed my filter and decided to pour some gas in it to flush it out a little and drained. Did that and put new filter in and didn't drive 30 miles and lost power big time. I was like What the heck!!
Got it home and pulled the filter back out and it was clogged up with black junk. Got to looking and I had a ton of junk in the bottom that the gas broke up. So I took a little o ring and piece of plastic and rolled it over the intake tube so no junk can get into it. Poured gas in it and took a air hose and churned it all up and drained it about three times and got it all clean. So next time you change your fuel filter , CHECK IT OUT.
Hope this helps some body.