Fuel issue on f150xa

[Surfjones3]

Having an issue with my Yamaha f150 about 600hrs, it had been running great all season, recently after about 5 minutes of cruising speed greater than 4000 rpms everything will be fine then a massive power drop hits and the rpms drop and can’t get back up. Last year I completely overhauled the high pressure fuel system new lines new filters new hp fuel pump, injectors cleaned ect. So far I have replaced my fuel water separator filter, cleaned the injectors again, drained the gas from the vst(all clean) and today ran off a separate fuel tank to eliminate a bad fuel pick up or anti syphon. I’m thinking that the VST is getting sucked dry at cursing speed bc of a bad lp fuel pump. Anyone with any feedback or ideas?

[Donnie Coulsting]

Did you check the vst filter itself? Did you try squeezing the priming bulb when it bogs down?