fuel system?'s
 

so ive been having fuel psi issues with the hot rod tug boat lately last week i put a new walbro392 pump in because i was running out of fuel psi and now the truck will run low on fuel just going thru the gears could a week fuel pump relay do this or do ya think somthins in the tank? new pump and filter in truck?
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Might be your HPOP going out or getting leak

no i got terminator oil this is a diesel problem i got 3000 psi hpo @wot

fuel pressure or inj starving of fuel
 

When you put the fuel pump in the tank did you take the fuel pump holder a part and clean it out ? It splits in half and needs to be cleaned inside. Somtimes dirt gets in there and the pump is not even bad.

ya i found the problem air pre pump some new line and some better clamps fixed it