As said give every inch of line a good checking over esp the neoprene sections. Might not have to R&R the tank & more than likely the sending unit (at least the line part of it) is fine & the pinhole leak is further downstream if this is a fuel delivery problem. EDIT forgot about the sock possibly being plugged & if so just blow it off or make a hole in it w 100 lbs of shop air w your rubber tipped nozzle. If the sock is blown off it will not cause any problem floating around in there & just (as always) use a good filter up front.