just for 6.0 owners reference NEVER buy cheap fuel filters! i replced some injectors in a truck and it went good. fired it up fine then changed the fuel filters with masterpro ones and it died on a test drive. threw injector circuit low codes on all 8, i got the masterpro filters for this job and turns out that was causing my no start issue! the top filter pushes down on a check valve of some sort and the cheap filters dont push it down all the way, not letting fuel into the bowl and causing a injector circuit low on even injector due to no fuel. replaced them with a napa filter set and it fired right up!

 

I'll add to this,

All fuel filters are junk for these, minus OEM Motorcraft and International.