yes like somebody said the fuel pump will run hotter as it is cooled by the fuel. do you know what the fuel pressure is?? pumping the pressure constaintly takes a good amout of power, and power is heat. fuel pumps that are run down to the low level even beofre the light comes on wont last as long as the ones that get filled before they are at the low level mark. there is no fuel cooler for the little bit of fuel left in there. Ive changed burnt up pumps. when efi started going on everything like boats the pumps were just a fuel pump inline...and they burnt up or burnt the leads off..... better units were made but life was still short. then they started using the sea water to cool the pump, those lasted way longer. ive been out of that end of things for a good while now I dont have a clue what all has been done now.