change the fuel filter and make sure the electrical connector on top of the pump is tight. take the drain plug out of the filter housing and use a screw driver to keep filter from spinning while you spin housing back on. the other issue that happens is the check ball on the outlet on the tank will get stuck. you will be able to tell if when you go to siphon the bad gas out of the tank, Then buy good gas, I had to do all these things but in over 1700hrs I never touched the injectors